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Alerts Issued in April 2014


Space Weather Message Code: WARK04
Serial Number: 2251
Issue Time: 2014 Apr 21 0555 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2250
Valid From: 2014 Apr 19 1815 UTC
Now Valid Until: 2014 Apr 21 1600 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: 897
Issue Time: 2014 Apr 21 0056 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 896
Valid From: 2014 Apr 20 1257 UTC
Now Valid Until: 2014 Apr 21 0600 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: SUMPX1
Serial Number: 75
Issue Time: 2014 Apr 20 1938 UTC

SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2014 Apr 18 1525 UTC
Maximum Time: 2014 Apr 19 0105 UTC
End Time: 2014 Apr 20 1155 UTC
Maximum 10MeV Flux: 58 pfu
NOAA Scale: S1 - Minor


Space Weather Message Code: WARPX1
Serial Number: 429
Issue Time: 2014 Apr 20 1936 UTC

CANCEL WARNING: Proton 10MeV Integral Flux above 10pfu expected
Cancel Serial Number: 428
Original Issue Time: 2014 Apr 18 1400 UTC

Comment: Conditions for this alert are no longer expected.
Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.


Space Weather Message Code: ALTK05
Serial Number: 742
Issue Time: 2014 Apr 20 1301 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2014 Apr 20 1301 UTC
Synoptic Period: 1200-1500 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: WARK04
Serial Number: 2250
Issue Time: 2014 Apr 20 1258 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2249
Valid From: 2014 Apr 19 1815 UTC
Now Valid Until: 2014 Apr 21 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: 896
Issue Time: 2014 Apr 20 1257 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2014 Apr 20 1257 UTC
Valid To: 2014 Apr 21 0100 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: 1705
Issue Time: 2014 Apr 20 1235 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2014 Apr 20 1235 UTC
Synoptic Period: 1200-1500 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: 191
Issue Time: 2014 Apr 20 1104 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2014 Apr 20 1057 UTC
Deviation: 24 nT
Station: Boulder


Space Weather Message Code: WARSUD
Serial Number: 151
Issue Time: 2014 Apr 20 1031 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2014 Apr 20 1045 UTC
Valid To: 2014 Apr 20 1120 UTC
IP Shock Passage Observed: 2014 Apr 20 1024 UTC


Space Weather Message Code: ALTTP2
Serial Number: 927
Issue Time: 2014 Apr 20 0841 UTC

ALERT: Type II Radio Emission
Begin Time: 2014 Apr 20 0815 UTC
Estimated Velocity: 529 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: WARPX1
Serial Number: 428
Issue Time: 2014 Apr 20 0057 UTC

EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 427
Valid From: 2014 Apr 18 1400 UTC
Now Valid Until: 2014 Apr 21 0600 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: 2249
Issue Time: 2014 Apr 19 1811 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2014 Apr 19 1815 UTC
Valid To: 2014 Apr 20 1815 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: WATA30
Serial Number: 111
Issue Time: 2014 Apr 19 1734 UTC

WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day:
Apr 20: G2 (Moderate) Apr 21: G1 (Minor) Apr 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: WARPX1
Serial Number: 427
Issue Time: 2014 Apr 19 1347 UTC

EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 426
Valid From: 2014 Apr 18 1400 UTC
Now Valid Until: 2014 Apr 20 0100 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: 1704
Issue Time: 2014 Apr 19 0209 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2014 Apr 19 0208 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: 2248
Issue Time: 2014 Apr 19 0134 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2014 Apr 19 0135 UTC
Valid To: 2014 Apr 19 1600 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: WATA20
Serial Number: 576
Issue Time: 2014 Apr 19 0055 UTC

WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Apr 19: None (Below G1) Apr 20: G1 (Minor) Apr 21: G1 (Minor)
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: ALTTP2
Serial Number: 926
Issue Time: 2014 Apr 18 1606 UTC

ALERT: Type II Radio Emission
Begin Time: 2014 Apr 18 1255 UTC
Estimated Velocity: 851 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: 458
Issue Time: 2014 Apr 18 1606 UTC

ALERT: Type IV Radio Emission
Begin Time: 2014 Apr 18 1249 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: ALTPX1
Serial Number: 308
Issue Time: 2014 Apr 18 1540 UTC

ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2014 Apr 18 1525 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: 76
Issue Time: 2014 Apr 18 1412 UTC

WARNING: Proton 100MeV Integral Flux above 1pfu expected
Valid From: 2014 Apr 18 1412 UTC
Valid To: 2014 Apr 18 2100 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: 426
Issue Time: 2014 Apr 18 1405 UTC

EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 425
Valid From: 2014 Apr 18 1400 UTC
Now Valid Until: 2014 Apr 19 1400 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor

Comment: Corrects end time.
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: 425
Issue Time: 2014 Apr 18 1400 UTC

WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2014 Apr 18 1400 UTC
Valid To: 2014 Apr 18 1400 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: 615
Issue Time: 2014 Apr 18 1325 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2014 Apr 18 1243 UTC
Maximum Time: 2014 Apr 18 1255 UTC
End Time: 2014 Apr 18 1307 UTC
Duration: 24 minutes
Peak Flux: 1000 sfu
Latest Penticton Noon Flux: 179 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: SUMXM5
Serial Number: 116
Issue Time: 2014 Apr 18 1323 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2014 Apr 18 1231 UTC
Maximum Time: 2014 Apr 18 1303 UTC
End Time: 2014 Apr 18 1320 UTC
X-ray Class: M7.3
Location: S18W34
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: ALTXMF
Serial Number: 218
Issue Time: 2014 Apr 18 1317 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2014 Apr 18 1255 UTC
NOAA Scale: R2 - Moderate

Comment: CORRECTION: Date threshold reached should read 18 Apr 2014 at 1255 UTC
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: ALTXMF
Serial Number: 217
Issue Time: 2014 Apr 18 1257 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2014 Apr 17 1255 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: WATA20
Serial Number: 575
Issue Time: 2014 Apr 17 1930 UTC

WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Apr 18: None (Below G1) Apr 19: None (Below G1) Apr 20: G1 (Minor)
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: 2247
Issue Time: 2014 Apr 17 1612 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2014 Apr 17 1612 UTC
Valid To: 2014 Apr 17 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: ALTTP2
Serial Number: 925
Issue Time: 2014 Apr 16 2055 UTC

ALERT: Type II Radio Emission
Begin Time: 2014 Apr 16 1958 UTC
Estimated Velocity: 1071 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: 457
Issue Time: 2014 Apr 16 1645 UTC

ALERT: Type IV Radio Emission
Begin Time: 2014 Apr 16 1459 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: 924
Issue Time: 2014 Apr 16 1555 UTC

ALERT: Type II Radio Emission
Begin Time: 2014 Apr 16 1441 UTC
Estimated Velocity: 940 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: 190
Issue Time: 2014 Apr 14 0624 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2014 Apr 14 0612 UTC
Deviation: 15 nT
Station: BOU


Space Weather Message Code: WARK04
Serial Number: 2246
Issue Time: 2014 Apr 13 1300 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2245
Valid From: 2014 Apr 12 1337 UTC
Now Valid Until: 2014 Feb 13 1600 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: 2245
Issue Time: 2014 Apr 13 0611 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2244
Valid From: 2014 Apr 12 1337 UTC
Now Valid Until: 2014 Apr 13 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: ALTK04
Serial Number: 1703
Issue Time: 2014 Apr 13 0217 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2014 Apr 13 0217 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: 2244
Issue Time: 2014 Apr 12 2255 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2243
Valid From: 2014 Apr 12 1337 UTC
Now Valid Until: 2014 Apr 13 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: WARK04
Serial Number: 2243
Issue Time: 2014 Apr 12 1338 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2014 Apr 12 1337 UTC
Valid To: 2014 Apr 12 2300 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: ALTK05
Serial Number: 741
Issue Time: 2014 Apr 12 0522 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2014 Apr 12 0522 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: 895
Issue Time: 2014 Apr 12 0515 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2014 Apr 12 0515 UTC
Valid To: 2014 Apr 12 1300 UTC
Warning Condition: Persistence
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: 740
Issue Time: 2014 Apr 12 0118 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2014 Apr 12 0118 UTC
Synoptic Period: 0000-0300 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: ALTK04
Serial Number: 1702
Issue Time: 2014 Apr 12 0113 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2014 Apr 12 0112 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: WARK05
Serial Number: 894
Issue Time: 2014 Apr 12 0113 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2014 Apr 12 0113 UTC
Valid To: 2014 Apr 12 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: WARK04
Serial Number: 2242
Issue Time: 2014 Apr 11 2121 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2014 Apr 11 2120 UTC
Valid To: 2014 Apr 12 1300 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: 923
Issue Time: 2014 Apr 10 0052 UTC

ALERT: Type II Radio Emission
Begin Time: 2014 Apr 10 0010 UTC
Estimated Velocity: 1109 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: ALTK04
Serial Number: 1701
Issue Time: 2014 Apr 07 1556 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2014 Apr 07 1551 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: 2241
Issue Time: 2014 Apr 07 1549 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2014 Apr 07 1545 UTC
Valid To: 2014 Apr 07 2200 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: ALTK04
Serial Number: 1700
Issue Time: 2014 Apr 05 1204 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2014 Apr 05 1204 UTC
Synoptic Period: 0900-1200 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: 2240
Issue Time: 2014 Apr 05 1128 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2014 Apr 05 1145 UTC
Valid To: 2014 Apr 06 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: ALTTP2
Serial Number: 922
Issue Time: 2014 Apr 04 1419 UTC

ALERT: Type II Radio Emission
Begin Time: 2014 Apr 04 1339 UTC
Estimated Velocity: 1803 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: 456
Issue Time: 2014 Apr 04 1358 UTC

ALERT: Type IV Radio Emission
Begin Time: 2014 Apr 04 1339 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: WATA20
Serial Number: 574
Issue Time: 2014 Apr 03 1758 UTC

WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Apr 04: G1 (Minor) Apr 05: G1 (Minor) Apr 06: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

Comment: Latest ENLIL analysis indicates CME arrival late on 04 Apr.
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: WATA20
Serial Number: 573
Issue Time: 2014 Apr 03 0537 UTC

WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Apr 04: None (Below G1) Apr 05: G1 (Minor) Apr 06: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

Comment: Reissued based on cancellation of G1 Watch for Apr 04.
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: WATA20
Serial Number: 571
Issue Time: 2014 Apr 03 0424 UTC

WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Apr 04: G1 (Minor) Apr 05: G1 (Minor) Apr 06: 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: SUMXM5
Serial Number: 115
Issue Time: 2014 Apr 02 1452 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2014 Apr 02 1318 UTC
Maximum Time: 2014 Apr 02 1405 UTC
End Time: 2014 Apr 02 1428 UTC
X-ray Class: M6.5
Optical Class: sf
Location: N10E62
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: SUM10R
Serial Number: 614
Issue Time: 2014 Apr 02 1417 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2014 Apr 02 1341 UTC
Maximum Time: 2014 Apr 02 1357 UTC
End Time: 2014 Apr 02 1407 UTC
Duration: 26 minutes
Peak Flux: 3700 sfu
Latest Penticton Noon Flux: 153 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: 921
Issue Time: 2014 Apr 02 1412 UTC

ALERT: Type II Radio Emission
Begin Time: 2014 Apr 02 1323 UTC
Estimated Velocity: 903 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: 216
Issue Time: 2014 Apr 02 1356 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2014 Apr 02 1355 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: 455
Issue Time: 2014 Apr 02 1352 UTC

ALERT: Type IV Radio Emission
Begin Time: 2014 Apr 02 1323 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.