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Alerts Issued in May 2013


Space Weather Message Code: WARK04
Serial Number: 2095
Issue Time: 2013 May 31 2319 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2013 May 31 2319 UTC
Valid To: 2013 Jun 01 0300 UTC
Warning Condition: Onset
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: ALTTP4
Serial Number: 418
Issue Time: 2013 May 31 2054 UTC

ALERT: Type IV Radio Emission
Begin Time: 2013 May 31 1957 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.


Space Weather Message Code: ALTTP2
Serial Number: 858
Issue Time: 2013 May 31 2053 UTC

ALERT: Type II Radio Emission
Begin Time: 2013 May 31 1957 UTC
Estimated Velocity: 1393 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.


Space Weather Message Code: SUMSUD
Serial Number: 174
Issue Time: 2013 May 31 1625 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2013 May 31 1618 UTC
Deviation: 9 nT
Station: Boulder


Space Weather Message Code: WARSUD
Serial Number: 132
Issue Time: 2013 May 31 1559 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2013 May 31 1604 UTC
Valid To: 2013 May 31 1704 UTC
IP Shock Passage Observed: 2013 May 31 1531 UTC


Space Weather Message Code: ALTTP2
Serial Number: 857
Issue Time: 2013 May 31 1217 UTC

ALERT: Type II Radio Emission
Begin Time: 2013 May 31 1122 UTC
Estimated Velocity: 1122 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.


Space Weather Message Code: ALTEF3
Serial Number: 2023
Issue Time: 2013 May 31 0507 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2022
Begin Time: 2013 May 24 1555 UTC
Yesterday Maximum 2MeV Flux: 30600 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: WATA20
Serial Number: 523
Issue Time: 2013 May 30 1520 UTC

WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
May 31: None (Below G1) Jun 01: G1 (Minor) Jun 02: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: ALTEF3
Serial Number: 2022
Issue Time: 2013 May 30 0512 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2021
Begin Time: 2013 May 24 1555 UTC
Yesterday Maximum 2MeV Flux: 35366 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: ALTEF3
Serial Number: 2021
Issue Time: 2013 May 29 0506 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2020
Begin Time: 2013 May 24 1555 UTC
Yesterday Maximum 2MeV Flux: 41204 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: ALTEF3
Serial Number: 2020
Issue Time: 2013 May 28 0506 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2019
Begin Time: 2013 May 24 1555 UTC
Yesterday Maximum 2MeV Flux: 58800 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: ALTK04
Serial Number: 1642
Issue Time: 2013 May 27 2032 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2013 May 27 2023 UTC
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK04
Serial Number: 2094
Issue Time: 2013 May 27 1947 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2013 May 27 1947 UTC
Valid To: 2013 May 28 0100 UTC
Warning Condition: Onset
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: ALTEF3
Serial Number: 2019
Issue Time: 2013 May 27 0522 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2018
Begin Time: 2013 May 24 1555 UTC
Yesterday Maximum 2MeV Flux: 11886 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: ALTEF3
Serial Number: 2018
Issue Time: 2013 May 26 2236 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2017
Begin Time: 2013 May 24 1555 UTC
Yesterday Maximum 2MeV Flux: 1563 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: WARK04
Serial Number: 2093
Issue Time: 2013 May 26 0652 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2092
Valid From: 2013 May 24 1750 UTC
Now Valid Until: 2013 May 26 1900 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK05
Serial Number: 845
Issue Time: 2013 May 26 0652 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 844
Valid From: 2013 May 25 1712 UTC
Now Valid Until: 2013 May 26 1400 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WARK05
Serial Number: 844
Issue Time: 2013 May 25 2216 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 843
Valid From: 2013 May 25 1712 UTC
Now Valid Until: 2013 May 26 0700 UTC
Warning Condition: Onset
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WARK04
Serial Number: 2092
Issue Time: 2013 May 25 2216 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2091
Valid From: 2013 May 24 1750 UTC
Now Valid Until: 2013 May 26 1200 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: ALTEF3
Serial Number: 2017
Issue Time: 2013 May 25 2113 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2016
Begin Time: 2013 May 24 1555 UTC
Yesterday Maximum 2MeV Flux: 2063 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: WATA20
Serial Number: 522
Issue Time: 2013 May 25 1900 UTC

WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
May 26: G1 (Minor) May 27: None (Below G1) May 28: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WARK04
Serial Number: 2091
Issue Time: 2013 May 25 1836 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2090
Valid From: 2013 May 24 1750 UTC
Now Valid Until: 2013 May 26 0200 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: ALTK05
Serial Number: 717
Issue Time: 2013 May 25 1715 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2013 May 25 1715 UTC
Synoptic Period: 1500-1800 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WARK05
Serial Number: 843
Issue Time: 2013 May 25 1712 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2013 May 25 1712 UTC
Valid To: 2013 May 25 2300 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: SUMPX1
Serial Number: 68
Issue Time: 2013 May 25 1439 UTC

SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2013 May 22 1420 UTC
Maximum Time: 2013 May 23 0650 UTC
End Time: 2013 May 25 0845 UTC
Maximum 10MeV Flux: 1660 pfu
NOAA Scale: S3 - Strong


Space Weather Message Code: WARK05
Serial Number: 842
Issue Time: 2013 May 25 0658 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 841
Valid From: 2013 May 24 2350 UTC
Now Valid Until: 2013 May 25 1300 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WARK04
Serial Number: 2090
Issue Time: 2013 May 25 0658 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2089
Valid From: 2013 May 24 1750 UTC
Now Valid Until: 2013 May 25 1900 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: ALTK05
Serial Number: 716
Issue Time: 2013 May 25 0435 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2013 May 25 0434 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WARK05
Serial Number: 841
Issue Time: 2013 May 25 0356 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 840
Valid From: 2013 May 24 2350 UTC
Now Valid Until: 2013 May 25 0700 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WARK04
Serial Number: 2089
Issue Time: 2013 May 25 0356 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2088
Valid From: 2013 May 24 1750 UTC
Now Valid Until: 2013 May 25 1100 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARPX1
Serial Number: 399
Issue Time: 2013 May 25 0055 UTC

EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 398
Valid From: 2013 May 22 1355 UTC
Now Valid Until: 2013 May 25 0700 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor
Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.


Space Weather Message Code: WARK04
Serial Number: 2088
Issue Time: 2013 May 24 2352 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2087
Valid From: 2013 May 24 1750 UTC
Now Valid Until: 2013 May 25 0700 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK05
Serial Number: 840
Issue Time: 2013 May 24 2352 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2013 May 24 2350 UTC
Valid To: 2013 May 25 0400 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: ALTK05
Serial Number: 715
Issue Time: 2013 May 24 1853 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2013 May 24 1853 UTC
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: SUMSUD
Serial Number: 173
Issue Time: 2013 May 24 1820 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2013 May 24 1812 UTC
Deviation: 18 nT
Station: Boulder


Space Weather Message Code: ALTK04
Serial Number: 1641
Issue Time: 2013 May 24 1816 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2013 May 24 1813 UTC
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK05
Serial Number: 839
Issue Time: 2013 May 24 1815 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2013 May 24 1814 UTC
Valid To: 2013 May 24 2200 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WARK04
Serial Number: 2087
Issue Time: 2013 May 24 1749 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2013 May 24 1750 UTC
Valid To: 2013 May 25 0200 UTC
Warning Condition: Onset
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARSUD
Serial Number: 131
Issue Time: 2013 May 24 1747 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2013 May 24 1750 UTC
Valid To: 2013 May 24 1850 UTC
IP Shock Passage Observed: 2013 May 24 1735 UTC


Space Weather Message Code: ALTEF3
Serial Number: 2016
Issue Time: 2013 May 24 1612 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2013 May 24 1555 UTC
Station: GOES15
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: SUMPX2
Serial Number: 34
Issue Time: 2013 May 24 0958 UTC

SUMMARY: Proton Event 10MeV Integral Flux exceeded 100pfu
Begin Time: 2013 May 22 1730 UTC
Maximum Time: 2013 May 23 0650 UTC
End Time: 2013 May 24 0435 UTC
Maximum 10MeV Flux: 1660 pfu
NOAA Scale: S3 - Strong


Space Weather Message Code: WARPX1
Serial Number: 398
Issue Time: 2013 May 24 0630 UTC

EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 397
Valid From: 2013 May 22 1355 UTC
Now Valid Until: 2012 May 25 0100 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor

Comment: This warning extension also serves as a downgrade from S2 flux levels (>100 pfu) to the current S1 levels (>10 pfu).
Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.


Space Weather Message Code: WATA20
Serial Number: 521
Issue Time: 2013 May 23 1952 UTC

WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
May 24: G1 (Minor) May 25: None (Below G1) May 26: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WARPX1
Serial Number: 397
Issue Time: 2013 May 23 1824 UTC

EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 396
Valid From: 2013 May 22 1355 UTC
Now Valid Until: 2013 May 24 0700 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S2 - Moderate

Comment: This warning extension also serves as a downgrade from S3 flux levels (>1000 pfu) to the current S2 levels (>100 pfu).
Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.


Space Weather Message Code: SUMPX3
Serial Number: 16
Issue Time: 2013 May 23 1811 UTC

SUMMARY: Proton Event 10MeV Integral Flux exceeded 1000pfu
Begin Time: 2013 May 23 0330 UTC
Maximum Time: 2013 May 23 0650 UTC
End Time: 2013 May 23 1040 UTC
Maximum 10MeV Flux: 1660 pfu
NOAA Scale: S3 - Strong


Space Weather Message Code: ALTEF3
Serial Number: 2015
Issue Time: 2013 May 23 1536 UTC

CANCEL ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Cancel Serial Number: 2014
Original Issue Time: 2013 May 23 0258 UTC

Comment: Electron flux readings are unreliable due to high levels of energetic protons.
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: SUMPC0
Serial Number: 24
Issue Time: 2013 May 23 1333 UTC

SUMMARY: Proton Event 100MeV Integral Flux exceeded 1pfu
Begin Time: 2013 May 22 1455 UTC
Maximum Time: 2013 May 22 1830 UTC
End Time: 2013 May 23 0745 UTC
Maximum 100MeV Flux: 3 pfu


Space Weather Message Code: WARPC0
Serial Number: 69
Issue Time: 2013 May 23 0543 UTC

EXTENDED WARNING: Proton 100MeV Integral Flux above 1pfu expected
Extension to Serial Number: 68
Valid From: 2013 May 22 1405 UTC
Now Valid Until: 2013 May 23 1400 UTC
Warning Condition: Persistence
Potential Impacts: An enhancement in the energetic portion of the solar radiation spectrum may indicate increased biological risk to astronauts or passengers and crew in high latitude, high altitude flights. Additionally, energetic particles may represent an increased risk to all satellite systems susceptible to single event effects. This information should be used in conjunction with the current Solar Radiation Storm conditions when assessing overall impact.


Space Weather Message Code: WARPX1
Serial Number: 396
Issue Time: 2013 May 23 0543 UTC

EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 395
Valid From: 2013 May 22 1355 UTC
Now Valid Until: 2013 May 23 1900 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S3 - Strong
Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.


Space Weather Message Code: ALTEF3
Serial Number: 2014
Issue Time: 2013 May 23 0509 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2013
Begin Time: 2013 May 23 0240 UTC
Yesterday Maximum 2MeV Flux: 3950 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: ALTPX3
Serial Number: 26
Issue Time: 2013 May 23 0348 UTC

ALERT: Proton Event 10MeV Integral Flux exceeded 1000pfu
Begin Time: 2013 May 23 0330 UTC
NOAA Scale: S3 - Strong
Potential Impacts: Radiation - Passengers and crew in high latitude, high altitude flights may experience increasing radiation exposures. Astronauts on EVA (extra-vehicular activity) are exposed to elevated radiation levels.
Spacecraft - Single-event upsets to satellite operations, noise in imaging systems, and slight reduction of efficiency in solar panels are likely.
Radio - Degraded or episodically blacked-out polar HF (high frequency) radio propagation.


Space Weather Message Code: ALTEF3
Serial Number: 2013
Issue Time: 2013 May 23 0258 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2013 May 23 0240 UTC
Station: GOES-15
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: ALTTP4
Serial Number: 417
Issue Time: 2013 May 22 1530 UTC

ALERT: Type IV Radio Emission
Begin Time: 2013 May 22 1303 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.


Space Weather Message Code: ALTPX2
Serial Number: 53
Issue Time: 2013 May 22 1521 UTC

ALERT: Proton Event 10MeV Integral Flux exceeded 100pfu
Begin Time: 2013 May 22 1520 UTC
NOAA Scale: S2 - Moderate
Potential Impacts: Radiation - Passengers and crew in high latitude, high altitude flights may experience small, increased radiation exposures.
Spacecraft - Infrequent single-event upsets to satellites are possible.
Radio - Small effects on polar HF (high frequency) propagation resulting in fades at lower frequencies.


Space Weather Message Code: ALTPC0
Serial Number: 39
Issue Time: 2013 May 22 1503 UTC

ALERT: Proton Event 100MeV Integral Flux exceeded 1pfu
Begin Time: 2013 May 22 1455 UTC
Potential Impacts: An enhancement in the energetic portion of the solar radiation spectrum may indicate increased biological risk to astronauts or passengers and crew in high latitude, high altitude flights. Additionally, energetic particles may represent an increased risk to all satellite systems susceptible to single event effects. This information should be used in conjunction with the current Solar Radiation Storm conditions when assessing overall impact.


Space Weather Message Code: SUMXM5
Serial Number: 103
Issue Time: 2013 May 22 1443 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2013 May 22 1230 UTC
Maximum Time: 2013 May 22 1338 UTC
End Time: 2013 May 22 1426 UTC
X-ray Class: M7.3
Optical Class: sf
Location: N13W75
NOAA Scale: R2 - Moderate
Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.


Space Weather Message Code: ALTPX1
Serial Number: 301
Issue Time: 2013 May 22 1428 UTC

ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2013 May 22 1420 UTC
NOAA Scale: S1 - Minor
Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.


Space Weather Message Code: WARPC0
Serial Number: 68
Issue Time: 2013 May 22 1404 UTC

WARNING: Proton 100MeV Integral Flux above 1pfu expected
Valid From: 2013 May 22 1405 UTC
Valid To: 2013 May 23 0600 UTC
Warning Condition: Onset
Potential Impacts: An enhancement in the energetic portion of the solar radiation spectrum may indicate increased biological risk to astronauts or passengers and crew in high latitude, high altitude flights. Additionally, energetic particles may represent an increased risk to all satellite systems susceptible to single event effects. This information should be used in conjunction with the current Solar Radiation Storm conditions when assessing overall impact.


Space Weather Message Code: WARPX1
Serial Number: 395
Issue Time: 2013 May 22 1352 UTC

WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2013 May 22 1355 UTC
Valid To: 2013 May 23 1200 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor
Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.


Space Weather Message Code: SUM10R
Serial Number: 583
Issue Time: 2013 May 22 1349 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2013 May 22 1309 UTC
Maximum Time: 2013 May 22 1314 UTC
End Time: 2013 May 22 1337 UTC
Duration: 28 minutes
Peak Flux: 350 sfu
Latest Penticton Noon Flux: 125 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.


Space Weather Message Code: ALTTP2
Serial Number: 856
Issue Time: 2013 May 22 1344 UTC

ALERT: Type II Radio Emission
Begin Time: 2013 May 22 1259 UTC
Estimated Velocity: 1237 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.


Space Weather Message Code: ALTXMF
Serial Number: 191
Issue Time: 2013 May 22 1325 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2013 May 22 1323 UTC
NOAA Scale: R2 - Moderate
Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/drap/index.html.


Space Weather Message Code: ALTK04
Serial Number: 1640
Issue Time: 2013 May 22 0250 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2013 May 22 0250 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK04
Serial Number: 2086
Issue Time: 2013 May 22 0037 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2013 May 22 0036 UTC
Valid To: 2013 May 22 0700 UTC
Warning Condition: Onset
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: ALTTP2
Serial Number: 855
Issue Time: 2013 May 20 1216 UTC

ALERT: Type II Radio Emission
Begin Time: 2013 May 20 1141 UTC
Estimated Velocity: 1061 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.


Space Weather Message Code: WATA30
Serial Number: 107
Issue Time: 2013 May 20 1155 UTC

CANCEL WATCH: Geomagnetic Storm Category G2 Predicted
Cancel Serial Number: 106
Original Issue Time: 2013 May 19 1855 UTC

Comment: Canceling watch for G2 Geomagnetic Storming on 20 May as data suggests CME has already passed.
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.


Space Weather Message Code: SUMSUD
Serial Number: 172
Issue Time: 2013 May 19 2322 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2013 May 19 2306 UTC
Deviation: 39 nT
Station: Boulder


Space Weather Message Code: WARK05
Serial Number: 838
Issue Time: 2013 May 19 2317 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2013 May 19 2320 UTC
Valid To: 2013 May 20 0700 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WARK04
Serial Number: 2085
Issue Time: 2013 May 19 2317 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2084
Valid From: 2013 May 19 0205 UTC
Now Valid Until: 2013 May 20 1300 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARSUD
Serial Number: 130
Issue Time: 2013 May 19 2229 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2013 May 19 2251 UTC
Valid To: 2013 May 19 2351 UTC
IP Shock Passage Observed: 2013 May 19 2221 UTC


Space Weather Message Code: WATA30
Serial Number: 106
Issue Time: 2013 May 19 1855 UTC

WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day:
May 20: G2 (Moderate) May 21: None (Below G1) May 22: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.


Space Weather Message Code: WARK04
Serial Number: 2084
Issue Time: 2013 May 19 1149 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2083
Valid From: 2013 May 19 0205 UTC
Now Valid Until: 2013 May 20 0100 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: ALTK04
Serial Number: 1639
Issue Time: 2013 May 19 0207 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2013 May 19 0205 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK04
Serial Number: 2083
Issue Time: 2013 May 19 0203 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2013 May 19 0205 UTC
Valid To: 2013 May 19 1200 UTC
Warning Condition: Onset
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: SUMPX1
Serial Number: 67
Issue Time: 2013 May 18 2207 UTC

SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2013 May 15 1325 UTC
Maximum Time: 2013 May 17 1720 UTC
End Time: 2013 May 18 1445 UTC
Maximum 10MeV Flux: 41 pfu
NOAA Scale: S1 - Minor


Space Weather Message Code: WARK05
Serial Number: 837
Issue Time: 2013 May 18 0531 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 836
Valid From: 2013 May 18 0252 UTC
Now Valid Until: 2013 May 18 0900 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WARK04
Serial Number: 2082
Issue Time: 2013 May 18 0302 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2081
Valid From: 2013 May 18 0100 UTC
Now Valid Until: 2013 May 18 1200 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: ALTK05
Serial Number: 714
Issue Time: 2013 May 18 0302 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2013 May 18 0300 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WARK05
Serial Number: 836
Issue Time: 2013 May 18 0254 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2013 May 18 0252 UTC
Valid To: 2013 May 18 0600 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: ALTK04
Serial Number: 1638
Issue Time: 2013 May 18 0133 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2013 May 18 0131 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: SUMSUD
Serial Number: 171
Issue Time: 2013 May 18 0121 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2013 May 18 0112 UTC
Deviation: 31 nT
Station: Boulder


Space Weather Message Code: WARK04
Serial Number: 2081
Issue Time: 2013 May 18 0033 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2013 May 18 0100 UTC
Valid To: 2013 May 18 0600 UTC
Warning Condition: Onset
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARSUD
Serial Number: 129
Issue Time: 2013 May 18 0031 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2013 May 18 0115 UTC
Valid To: 2013 May 18 0145 UTC
IP Shock Passage Observed: 2013 May 18 0023 UTC


Space Weather Message Code: WATA30
Serial Number: 105
Issue Time: 2013 May 17 2124 UTC

WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day:
May 18: None (Below G1) May 19: G2 (Moderate) May 20: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.


Space Weather Message Code: ALTTP2
Serial Number: 854
Issue Time: 2013 May 17 0927 UTC

ALERT: Type II Radio Emission
Begin Time: 2013 May 17 0850 UTC
Estimated Velocity: 376 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.


Space Weather Message Code: ALTTP4
Serial Number: 416
Issue Time: 2013 May 17 0927 UTC

ALERT: Type IV Radio Emission
Begin Time: 2013 May 17 0850 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.


Space Weather Message Code: SUM10R
Serial Number: 582
Issue Time: 2013 May 17 0926 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2013 May 17 0848 UTC
Maximum Time: 2013 May 17 0857 UTC
End Time: 2013 May 17 0912 UTC
Duration: 24 minutes
Peak Flux: 450 sfu
Latest Penticton Noon Flux: 145 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.


Space Weather Message Code: WARPX1
Serial Number: 394
Issue Time: 2013 May 17 0825 UTC

EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 393
Valid From: 2013 May 15 1232 UTC
Now Valid Until: 2013 May 18 2300 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor

Comment: 10 MeV Proton levels continue to persist at about 25 pfu.
Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.


Space Weather Message Code: WARK04
Serial Number: 2080
Issue Time: 2013 May 16 2033 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2079
Valid From: 2013 May 16 1605 UTC
Now Valid Until: 2013 May 17 0300 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: ALTK04
Serial Number: 1637
Issue Time: 2013 May 16 1627 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2013 May 16 1623 UTC
Synoptic Period: 1500-1800 UTC
Active Warning: Yes
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK04
Serial Number: 2079
Issue Time: 2013 May 16 1607 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2013 May 16 1605 UTC
Valid To: 2013 May 16 2100 UTC
Warning Condition: Onset
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARPX1
Serial Number: 393
Issue Time: 2013 May 16 1131 UTC

EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 392
Valid From: 2013 May 15 1232 UTC
Now Valid Until: 2013 May 17 1200 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor
Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.


Space Weather Message Code: ALTK04
Serial Number: 1636
Issue Time: 2013 May 16 0401 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2013 May 16 0358 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK04
Serial Number: 2078
Issue Time: 2013 May 16 0341 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2013 May 16 0345 UTC
Valid To: 2013 May 16 0900 UTC
Warning Condition: Onset
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: ALTPX1
Serial Number: 300
Issue Time: 2013 May 15 1347 UTC

ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2013 May 15 1335 UTC
NOAA Scale: S1 - Minor
Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.


Space Weather Message Code: WARPX1
Serial Number: 392
Issue Time: 2013 May 15 1233 UTC

WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2013 May 15 1232 UTC
Valid To: 2013 May 16 1200 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor
Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.


Space Weather Message Code: ALTTP2
Serial Number: 853
Issue Time: 2013 May 15 0222 UTC

ALERT: Type II Radio Emission
Begin Time: 2013 May 15 0137 UTC
Estimated Velocity: 501 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.


Space Weather Message Code: SUMX01
Serial Number: 86
Issue Time: 2013 May 15 0211 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2013 May 15 0125 UTC
Maximum Time: 2013 May 15 0148 UTC
End Time: 2013 May 15 0158 UTC
X-ray Class: X1.2
Optical Class: 1b
Location: N11E63
NOAA Scale: R3 - Strong
Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.


Space Weather Message Code: SUM10R
Serial Number: 581
Issue Time: 2013 May 15 0203 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2013 May 15 0133 UTC
Maximum Time: 2013 May 15 0143 UTC
End Time: 2013 May 15 0150 UTC
Duration: 17 minutes
Peak Flux: 490 sfu
Latest Penticton Noon Flux: 148 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.


Space Weather Message Code: ALTTP4
Serial Number: 415
Issue Time: 2013 May 15 0202 UTC

ALERT: Type IV Radio Emission
Begin Time: 2013 May 15 0135 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.


Space Weather Message Code: ALTXMF
Serial Number: 190
Issue Time: 2013 May 15 0143 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2013 May 15 0141 UTC
NOAA Scale: R2 - Moderate
Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/drap/index.html.


Space Weather Message Code: SUM10R
Serial Number: 580
Issue Time: 2013 May 14 0249 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2013 May 14 0200 UTC
Maximum Time: 2013 May 14 0203 UTC
End Time: 2013 May 14 0210 UTC
Duration: 10 minutes
Peak Flux: 370 sfu
Latest Penticton Noon Flux: 150 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.


Space Weather Message Code: SUM10R
Serial Number: 579
Issue Time: 2013 May 14 0210 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2013 May 14 0134 UTC
Maximum Time: 2013 May 14 0141 UTC
End Time: 2013 May 14 0143 UTC
Duration: 9 minutes
Peak Flux: 190 sfu
Latest Penticton Noon Flux: 150 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.


Space Weather Message Code: SUMX01
Serial Number: 85
Issue Time: 2013 May 14 0144 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2013 May 13 2359 UTC
Maximum Time: 2013 May 14 0111 UTC
End Time: 2013 May 14 0120 UTC
X-ray Class: X3.2
Optical Class: 2b
Location: N12E77
NOAA Scale: R3 - Strong
Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.


Space Weather Message Code: ALTTP2
Serial Number: 852
Issue Time: 2013 May 14 0138 UTC

ALERT: Type II Radio Emission
Begin Time: 2013 May 14 0107 UTC
Estimated Velocity: 1514 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.


Space Weather Message Code: SUM10R
Serial Number: 578
Issue Time: 2013 May 14 0137 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2013 May 14 0104 UTC
Maximum Time: 2013 May 14 0115 UTC
End Time: 2013 May 14 0120 UTC
Duration: 16 minutes
Peak Flux: 560 sfu
Latest Penticton Noon Flux: 150 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.


Space Weather Message Code: ALTTP4
Serial Number: 414
Issue Time: 2013 May 14 0128 UTC

ALERT: Type IV Radio Emission
Begin Time: 2013 May 14 0113 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.


Space Weather Message Code: ALTXMF
Serial Number: 189
Issue Time: 2013 May 14 0108 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2013 May 14 0105 UTC
NOAA Scale: R2 - Moderate
Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/drap/index.html.


Space Weather Message Code: ALTTP2
Serial Number: 851
Issue Time: 2013 May 13 1701 UTC

ALERT: Type II Radio Emission
Begin Time: 2013 May 13 1557 UTC
Estimated Velocity: 949 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.


Space Weather Message Code: ALTTP4
Serial Number: 413
Issue Time: 2013 May 13 1701 UTC

ALERT: Type IV Radio Emission
Begin Time: 2013 May 13 1557 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.


Space Weather Message Code: SUMX01
Serial Number: 84
Issue Time: 2013 May 13 1652 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2013 May 13 1548 UTC
Maximum Time: 2013 May 13 1605 UTC
End Time: 2013 May 13 1616 UTC
X-ray Class: X2.8
Optical Class: 1n
Location: N11E85
NOAA Scale: R3 - Strong
Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.


Space Weather Message Code: SUM10R
Serial Number: 577
Issue Time: 2013 May 13 1649 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2013 May 13 1553 UTC
Maximum Time: 2013 May 13 1601 UTC
End Time: 2013 May 13 1618 UTC
Duration: 25 minutes
Peak Flux: 520 sfu
Latest Penticton Noon Flux: 147 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.


Space Weather Message Code: ALTXMF
Serial Number: 188
Issue Time: 2013 May 13 1559 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2013 May 13 1557 UTC
NOAA Scale: R2 - Moderate
Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/drap/index.html.


Space Weather Message Code: ALTTP2
Serial Number: 850
Issue Time: 2013 May 13 0310 UTC

ALERT: Type II Radio Emission
Begin Time: 2013 May 13 0210 UTC
Estimated Velocity: 2347 km/s

Comment: Speed is based on report from Learmonth with an error of +/- 583 km/s.
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.


Space Weather Message Code: SUM10R
Serial Number: 576
Issue Time: 2013 May 13 0241 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2013 May 13 0208 UTC
Maximum Time: 2013 May 13 0219 UTC
End Time: 2013 May 13 0222 UTC
Duration: 14 minutes
Peak Flux: 320 sfu
Latest Penticton Noon Flux: 147 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.


Space Weather Message Code: SUMX01
Serial Number: 83
Issue Time: 2013 May 13 0237 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2013 May 13 0153 UTC
Maximum Time: 2013 May 13 0217 UTC
End Time: 2013 May 13 0232 UTC
X-ray Class: X1.7
Location: N15E90
NOAA Scale: R3 - Strong

Comment: This event originated from an unnumbered region from around the east limb at about N15.
Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.


Space Weather Message Code: ALTXMF
Serial Number: 187
Issue Time: 2013 May 13 0206 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2013 May 13 0204 UTC
NOAA Scale: R2 - Moderate
Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/drap/index.html.


Space Weather Message Code: WARK04
Serial Number: 2077
Issue Time: 2013 May 06 0935 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2013 May 06 1000 UTC
Valid To: 2013 May 06 1500 UTC
Warning Condition: Onset
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: ALTEF3
Serial Number: 2012
Issue Time: 2013 May 04 0911 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2011
Begin Time: 2013 May 03 1120 UTC
Yesterday Maximum 2MeV Flux: 1906 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: ALTTP4
Serial Number: 412
Issue Time: 2013 May 03 1940 UTC

ALERT: Type IV Radio Emission
Begin Time: 2013 May 03 1847 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.


Space Weather Message Code: SUMXM5
Serial Number: 102
Issue Time: 2013 May 03 1839 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2013 May 03 1724 UTC
Maximum Time: 2013 May 03 1732 UTC
End Time: 2013 May 03 1741 UTC
X-ray Class: M5.7
Optical Class: sf
Location: N16E81
NOAA Scale: R2 - Moderate

Comment: New Region 1739.
Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.


Space Weather Message Code: ALTTP2
Serial Number: 849
Issue Time: 2013 May 03 1819 UTC

ALERT: Type II Radio Emission
Begin Time: 2013 May 03 1745 UTC
Estimated Velocity: 1297 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.


Space Weather Message Code: ALTXMF
Serial Number: 186
Issue Time: 2013 May 03 1732 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2013 May 03 1729 UTC
NOAA Scale: R2 - Moderate
Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/drap/index.html.


Space Weather Message Code: ALTTP4
Serial Number: 411
Issue Time: 2013 May 03 1607 UTC

ALERT: Type IV Radio Emission
Begin Time: 2013 May 03 1516 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.


Space Weather Message Code: ALTEF3
Serial Number: 2011
Issue Time: 2013 May 03 1301 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2013 May 03 1120 UTC
Station: GOES13
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: ALTTP2
Serial Number: 848
Issue Time: 2013 May 02 0551 UTC

ALERT: Type II Radio Emission
Begin Time: 2013 May 02 0506 UTC
Estimated Velocity: 703 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.


Space Weather Message Code: SUM10R
Serial Number: 575
Issue Time: 2013 May 02 0521 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2013 May 02 0502 UTC
Maximum Time: 2013 May 02 0505 UTC
End Time: 2013 May 02 0505 UTC
Duration: 3 minutes
Peak Flux: 240 sfu
Latest Penticton Noon Flux: 159 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.


Space Weather Message Code: WARK04
Serial Number: 2076
Issue Time: 2013 May 02 0255 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2075
Valid From: 2013 May 01 0530 UTC
Now Valid Until: 2013 May 02 1500 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK04
Serial Number: 2075
Issue Time: 2013 May 01 1755 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2074
Valid From: 2013 May 01 0530 UTC
Now Valid Until: 2013 May 02 0300 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK05
Serial Number: 835
Issue Time: 2013 May 01 1755 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 834
Valid From: 2013 May 01 0748 UTC
Now Valid Until: 2013 May 02 0000 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WARK04
Serial Number: 2074
Issue Time: 2013 May 01 1143 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2073
Valid From: 2013 May 01 0530 UTC
Now Valid Until: 2013 May 01 1800 UTC
Warning Condition: Onset

Comment: Conditions continue to exist for this warning.
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK05
Serial Number: 834
Issue Time: 2013 May 01 1143 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 833
Valid From: 2013 May 01 0748 UTC
Now Valid Until: 2013 May 01 1800 UTC
Warning Condition: Onset

Comment: Conditions continue to exist for this warning.
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WARK05
Serial Number: 833
Issue Time: 2013 May 01 0750 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2013 May 01 0748 UTC
Valid To: 2013 May 01 1200 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: ALTK04
Serial Number: 1635
Issue Time: 2013 May 01 0747 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2013 May 01 0745 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK04
Serial Number: 2073
Issue Time: 2013 May 01 0521 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2013 May 01 0530 UTC
Valid To: 2013 May 01 1200 UTC
Warning Condition: Onset
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.