NOAA / Space Weather Prediction Center

Mass Ejection graphic

Space Weather Alerts

Alerts/Displays - Archive - Email Registration - Help/Samples

Alerts in Graphical Timelines: Past 7 days and Currently in Effect
Alerts in Text Format: Current month and Previous month

Alerts Issued in May 2012


Space Weather Message Code: ALTEF3
Serial Number: 1910
Issue Time: 2012 May 29 1220 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1909
Begin Time: 2012 May 24 1235 UTC
Yesterday Maximum 2MeV Flux: 2753 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: ALTEF3
Serial Number: 1909
Issue Time: 2012 May 28 0818 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1908
Begin Time: 2012 May 24 1235 UTC
Yesterday Maximum 2MeV Flux: 2733 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: SUMPX1
Serial Number: 55
Issue Time: 2012 May 27 2104 UTC

SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2012 May 27 0535 UTC
Maximum Time: 2012 May 27 1045 UTC
End Time: 2012 May 27 1235 UTC
Maximum 10MeV Flux: 14 pfu
NOAA Scale: S1 - Minor


Space Weather Message Code: WARPX1
Serial Number: 357
Issue Time: 2012 May 27 1155 UTC

EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 356
Valid From: 2012 May 26 2346 UTC
Now Valid Until: 2012 May 28 0000 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: ALTEF3
Serial Number: 1908
Issue Time: 2012 May 27 0831 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1907
Begin Time: 2012 May 24 1235 UTC
Yesterday Maximum 2MeV Flux: 2136 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: ALTPX1
Serial Number: 288
Issue Time: 2012 May 27 0541 UTC

ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2012 May 27 0505 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: 356
Issue Time: 2012 May 26 2346 UTC

WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2012 May 26 2346 UTC
Valid To: 2012 May 27 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: ALTTP4
Serial Number: 371
Issue Time: 2012 May 26 2212 UTC

ALERT: Type IV Radio Emission
Begin Time: 2012 May 26 2102 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: 795
Issue Time: 2012 May 26 2123 UTC

ALERT: Type II Radio Emission
Begin Time: 2012 May 26 2047 UTC
Estimated Velocity: 751 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: 1907
Issue Time: 2012 May 26 1127 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1906
Begin Time: 2012 May 24 1235 UTC
Yesterday Maximum 2MeV Flux: 1240 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: ALTEF3
Serial Number: 1906
Issue Time: 2012 May 25 1503 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1905
Begin Time: 2012 May 24 1235 UTC
Yesterday Maximum 2MeV Flux: 3704 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: ALTEF3
Serial Number: 1905
Issue Time: 2012 May 25 1457 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1904
Begin Time: 2012 May 24 1235 UTC
Yesterday Maximum 2MeV Flux: 3704 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: ALTEF3
Serial Number: 1904
Issue Time: 2012 May 24 1241 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2012 May 24 1235 UTC
Station: GOES13
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: WARK04
Serial Number: 1934
Issue Time: 2012 May 23 0618 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 1933
Valid From: 2012 May 22 1857 UTC
Now Valid Until: 2012 May 23 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: ALTK05
Serial Number: 688
Issue Time: 2012 May 23 0605 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2012 May 23 0600 UTC
Synoptic Period: 0600-0900 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: 775
Issue Time: 2012 May 23 0238 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2012 May 23 0245 UTC
Valid To: 2012 May 23 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: ALTK04
Serial Number: 1583
Issue Time: 2012 May 22 1914 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2012 May 22 1912 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: 1933
Issue Time: 2012 May 22 1858 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2012 May 22 1857 UTC
Valid To: 2012 May 23 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: WARK04
Serial Number: 1932
Issue Time: 2012 May 22 0357 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 1931
Valid From: 2012 May 21 1943 UTC
Now Valid Until: 2012 May 22 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: 1582
Issue Time: 2012 May 21 1948 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2012 May 21 1947 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: SUMSUD
Serial Number: 152
Issue Time: 2012 May 21 1944 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2012 May 21 1937 UTC
Deviation: 34 nT
Station: Boulder


Space Weather Message Code: WARK04
Serial Number: 1931
Issue Time: 2012 May 21 1943 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2012 May 21 1943 UTC
Valid To: 2012 May 22 0400 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: 112
Issue Time: 2012 May 21 1855 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2012 May 21 1915 UTC
Valid To: 2012 May 21 2015 UTC
IP Shock Passage Observed: 2012 May 21 1844 UTC


Space Weather Message Code: ALTK04
Serial Number: 1581
Issue Time: 2012 May 20 0530 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2012 May 20 0514 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes

Comment: Re-issued K4 alert to correct the threshold reached time.
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: 1580
Issue Time: 2012 May 20 0529 UTC

CANCEL ALERT: Geomagnetic K-index of 4
Cancel Serial Number: 1579
Original Issue Time: 2012 May 20 0516 UTC

Comment: Cancelled to correct threshold reached time.
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: 1579
Issue Time: 2012 May 20 0516 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2012 May 20 0511 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: 1930
Issue Time: 2012 May 20 0241 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2012 May 20 0245 UTC
Valid To: 2012 May 20 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: SUMSUD
Serial Number: 151
Issue Time: 2012 May 20 0231 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2012 May 20 0215 UTC
Deviation: 15 nT
Station: Boulder


Space Weather Message Code: WARSUD
Serial Number: 111
Issue Time: 2012 May 20 0153 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2012 May 20 0215 UTC
Valid To: 2012 May 20 0245 UTC
IP Shock Passage Observed: 2012 May 20 0136 UTC

Comment: IP shock was weak, so weak Sudden Impulse, if any, expected.


Space Weather Message Code: SUMPX1
Serial Number: 54
Issue Time: 2012 May 19 0031 UTC

SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2012 May 17 0210 UTC
Maximum Time: 2012 May 17 0430 UTC
End Time: 2012 May 18 1620 UTC
Maximum 10MeV Flux: 255 pfu
NOAA Scale: S2 - Moderate


Space Weather Message Code: SUMPC0
Serial Number: 22
Issue Time: 2012 May 17 2330 UTC

SUMMARY: Proton Event 100MeV Integral Flux exceeded 1pfu
Begin Time: 2012 May 17 0200 UTC
Maximum Time: 2012 May 17 0230 UTC
End Time: 2012 May 17 1725 UTC
Maximum 100MeV Flux: 20 pfu


Space Weather Message Code: WARPX1
Serial Number: 355
Issue Time: 2012 May 17 2330 UTC

EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 354
Valid From: 2012 May 17 0255 UTC
Now Valid Until: 2012 May 18 1300 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: SUMPX2
Serial Number: 31
Issue Time: 2012 May 17 1815 UTC

SUMMARY: Proton Event 10MeV Integral Flux exceeded 100pfu
Begin Time: 2012 May 17 0245 UTC
Maximum Time: 2012 May 17 0430 UTC
End Time: 2012 May 17 0945 UTC
Maximum 10MeV Flux: 255 pfu
NOAA Scale: S2 - Moderate


Space Weather Message Code: SUM10R
Serial Number: 540
Issue Time: 2012 May 17 0329 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2012 May 17 0129 UTC
Maximum Time: 2012 May 17 0142 UTC
End Time: 2012 May 17 0151 UTC
Duration: 22 minutes
Peak Flux: 600 sfu
Latest Penticton Noon Flux: 131 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: 794
Issue Time: 2012 May 17 0327 UTC

ALERT: Type II Radio Emission
Begin Time: 2012 May 17 0131 UTC
Estimated Velocity: 645 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: 370
Issue Time: 2012 May 17 0327 UTC

ALERT: Type IV Radio Emission
Begin Time: 2012 May 17 0132 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: 90
Issue Time: 2012 May 17 0258 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2012 May 17 0125 UTC
Maximum Time: 2012 May 17 0147 UTC
End Time: 2012 May 17 0214 UTC
X-ray Class: M5.1
Location: N13W73
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: 171
Issue Time: 2012 May 17 0257 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2012 May 17 0143 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: WARPC0
Serial Number: 62
Issue Time: 2012 May 17 0256 UTC

WARNING: Proton 100MeV Integral Flux above 1pfu expected
Valid From: 2012 May 17 0255 UTC
Valid To: 2012 May 17 2359 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: ALTPX1
Serial Number: 287
Issue Time: 2012 May 17 0256 UTC

ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2012 May 17 0255 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: 354
Issue Time: 2012 May 17 0255 UTC

WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2012 May 17 0255 UTC
Valid To: 2012 May 17 2359 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: ALTPC0
Serial Number: 37
Issue Time: 2012 May 17 0253 UTC

ALERT: Proton Event 100MeV Integral Flux exceeded 1pfu
Begin Time: 2012 May 17 0252 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: ALTK04
Serial Number: 1578
Issue Time: 2012 May 16 2314 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2012 May 16 2313 UTC
Synoptic Period: 2100-2400 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: 1929
Issue Time: 2012 May 16 2311 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2012 May 16 2310 UTC
Valid To: 2012 May 17 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: ALTEF3
Serial Number: 1903
Issue Time: 2012 May 16 0651 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1902
Begin Time: 2012 May 10 1415 UTC
Yesterday Maximum 2MeV Flux: 3226 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: SUM10R
Serial Number: 539
Issue Time: 2012 May 15 0959 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2012 May 15 0938 UTC
Maximum Time: 2012 May 15 0939 UTC
End Time: 2012 May 15 0939 UTC
Duration: 1 minutes
Peak Flux: 200 sfu
Latest Penticton Noon Flux: 130 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: ALTEF3
Serial Number: 1902
Issue Time: 2012 May 15 0936 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1901
Begin Time: 2012 May 10 1415 UTC
Yesterday Maximum 2MeV Flux: 5225 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: ALTEF3
Serial Number: 1901
Issue Time: 2012 May 14 0530 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1900
Begin Time: 2012 May 10 1415 UTC
Yesterday Maximum 2MeV Flux: 4270 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: ALTEF3
Serial Number: 1900
Issue Time: 2012 May 13 1106 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1899
Begin Time: 2012 May 10 1415 UTC
Yesterday Maximum 2MeV Flux: 11500 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: ALTEF3
Serial Number: 1899
Issue Time: 2012 May 12 0516 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1898
Begin Time: 2012 May 10 1415 UTC
Yesterday Maximum 2MeV Flux: 3410 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: ALTEF3
Serial Number: 1898
Issue Time: 2012 May 11 1018 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1897
Begin Time: 2012 May 10 1415 UTC
Yesterday Maximum 2MeV Flux: 2180 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: ALTK04
Serial Number: 1577
Issue Time: 2012 May 11 0000 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2012 May 10 2359 UTC
Synoptic Period: 2100-2400 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: 1928
Issue Time: 2012 May 10 2314 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2012 May 10 2315 UTC
Valid To: 2012 May 11 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: ALTEF3
Serial Number: 1897
Issue Time: 2012 May 10 1434 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2012 May 10 1415 UTC
Station: GOES13
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: ALTTP4
Serial Number: 369
Issue Time: 2012 May 10 0516 UTC

ALERT: Type IV Radio Emission
Begin Time: 2012 May 10 0402 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: 538
Issue Time: 2012 May 10 0435 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2012 May 10 0415 UTC
Maximum Time: 2012 May 10 0417 UTC
End Time: 2012 May 10 0418 UTC
Duration: 3 minutes
Peak Flux: 690 sfu
Latest Penticton Noon Flux: 127 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: 89
Issue Time: 2012 May 10 0429 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2012 May 10 0411 UTC
Maximum Time: 2012 May 10 0418 UTC
End Time: 2012 May 10 0423 UTC
X-ray Class: M5.7
Optical Class: 2b
Location: N13E22
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: 170
Issue Time: 2012 May 10 0418 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2012 May 10 0417 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: WARK05
Serial Number: 774
Issue Time: 2012 May 09 2355 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 773
Valid From: 2012 May 09 2053 UTC
Now Valid Until: 2012 May 10 0300 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: 1927
Issue Time: 2012 May 09 2348 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 1926
Valid From: 2012 May 08 2208 UTC
Now Valid Until: 2012 May 10 0900 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: SUM10R
Serial Number: 537
Issue Time: 2012 May 09 2117 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2012 May 09 2103 UTC
Maximum Time: 2012 May 09 2104 UTC
End Time: 2012 May 09 2104 UTC
Duration: 1 minutes
Peak Flux: 240 sfu
Latest Penticton Noon Flux: 127 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: ALTK05
Serial Number: 687
Issue Time: 2012 May 09 2104 UTC

CANCEL ALERT: Geomagnetic K-index of 5
Cancel Serial Number: 686
Original Issue Time: 2012 May 09 2054 UTC

Comment: This alert was issued falsely due to a noise spike. The actual value for the period is a K-index of 4.
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: 773
Issue Time: 2012 May 09 2054 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2012 May 09 2053 UTC
Valid To: 2012 May 10 0000 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: 686
Issue Time: 2012 May 09 2054 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2012 May 09 2053 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: WARK04
Serial Number: 1926
Issue Time: 2012 May 09 1733 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 1925
Valid From: 2012 May 08 2208 UTC
Now Valid Until: 2012 May 09 2359 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: 1925
Issue Time: 2012 May 09 1156 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 1924
Valid From: 2012 May 08 2208 UTC
Now Valid Until: 2012 May 09 1800 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: 1924
Issue Time: 2012 May 09 0556 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 1923
Valid From: 2012 May 08 2208 UTC
Now Valid Until: 2012 May 09 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: ALTK04
Serial Number: 1576
Issue Time: 2012 May 08 2359 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2012 May 08 2357 UTC
Synoptic Period: 2100-2400 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: 1923
Issue Time: 2012 May 08 2208 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2012 May 08 2208 UTC
Valid To: 2012 May 09 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: SUM10R
Serial Number: 536
Issue Time: 2012 May 07 1750 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2012 May 07 1723 UTC
Maximum Time: 2012 May 07 1724 UTC
End Time: 2012 May 07 1728 UTC
Duration: 5 minutes
Peak Flux: 350 sfu
Latest Penticton Noon Flux: 117 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: 368
Issue Time: 2012 May 07 1507 UTC

ALERT: Type IV Radio Emission
Begin Time: 2012 May 07 1409 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: 535
Issue Time: 2012 May 07 1445 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2012 May 07 1414 UTC
Maximum Time: 2012 May 07 1415 UTC
End Time: 2012 May 07 1426 UTC
Duration: 12 minutes
Peak Flux: 240 sfu
Latest Penticton Noon Flux: 117 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: 534
Issue Time: 2012 May 07 1221 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2012 May 07 1106 UTC
Maximum Time: 2012 May 07 1107 UTC
End Time: 2012 May 07 1107 UTC
Duration: 1 minutes
Peak Flux: 130 sfu
Latest Penticton Noon Flux: 117 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: ALTEF3
Serial Number: 1896
Issue Time: 2012 May 02 0503 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1895
Begin Time: 2012 Apr 25 0220 UTC
Yesterday Maximum 2MeV Flux: 7880 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: ALTEF3
Serial Number: 1895
Issue Time: 2012 May 01 0503 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1894
Begin Time: 2012 Apr 25 0220 UTC
Yesterday Maximum 2MeV Flux: 7140 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.