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Alerts Issued in September 2012


Space Weather Message Code: SUMSUD
Serial Number: 160
Issue Time: 2012 Sep 30 2316 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2012 Sep 30 2307 UTC
Deviation: 35 nT
Station: Boulder


Space Weather Message Code: ALTK04
Serial Number: 1611
Issue Time: 2012 Sep 30 2311 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2012 Sep 30 2308 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: 2009
Issue Time: 2012 Sep 30 2226 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2012 Sep 30 2230 UTC
Valid To: 2012 Oct 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.


Space Weather Message Code: WARSUD
Serial Number: 119
Issue Time: 2012 Sep 30 2221 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2012 Sep 30 2300 UTC
Valid To: 2012 Sep 30 2330 UTC
IP Shock Passage Observed: 2012 Sep 30 2213 UTC


Space Weather Message Code: WATA20
Serial Number: 498
Issue Time: 2012 Sep 30 2121 UTC

WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Oct 01: G1 (Minor) Oct 02: None (Below G1) Oct 03: 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: WATA30
Serial Number: 98
Issue Time: 2012 Sep 30 2120 UTC

CANCEL WATCH: Geomagnetic Storm Category G2 Predicted
Cancel Serial Number: 97
Original Issue Time: 2012 Sep 28 2027 UTC

Comment: Conditions for the G2 Watch no longer exist.
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: 159
Issue Time: 2012 Sep 30 1148 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2012 Sep 30 1138 UTC
Deviation: 15 nT
Station: Boulder


Space Weather Message Code: WARSUD
Serial Number: 118
Issue Time: 2012 Sep 30 1041 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2012 Sep 30 1140 UTC
Valid To: 2012 Sep 30 1210 UTC
IP Shock Passage Observed: 2012 Sep 30 1025 UTC


Space Weather Message Code: WATA30
Serial Number: 97
Issue Time: 2012 Sep 28 2027 UTC

WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day:
Sep 29: None (Below G1) Sep 30: G2 (Moderate) Oct 01: G2 (Moderate)
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: SUMPX1
Serial Number: 64
Issue Time: 2012 Sep 28 1455 UTC

SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2012 Sep 28 0300 UTC
Maximum Time: 2012 Sep 28 0445 UTC
End Time: 2012 Sep 28 1040 UTC
Maximum 10MeV Flux: 28 pfu
NOAA Scale: S1 - Minor


Space Weather Message Code: ALTPX1
Serial Number: 297
Issue Time: 2012 Sep 28 0315 UTC

ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2012 Sep 28 0300 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: 385
Issue Time: 2012 Sep 28 0147 UTC

WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2012 Sep 28 0200 UTC
Valid To: 2012 Sep 28 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: WARK04
Serial Number: 2008
Issue Time: 2012 Sep 20 0045 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2007
Valid From: 2012 Sep 19 2042 UTC
Now Valid Until: 2012 Sep 20 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: ALTK04
Serial Number: 1610
Issue Time: 2012 Sep 19 2047 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2012 Sep 19 2047 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: 2007
Issue Time: 2012 Sep 19 2042 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2012 Sep 19 2042 UTC
Valid To: 2012 Sep 20 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: WARSUD
Serial Number: 117
Issue Time: 2012 Sep 16 0409 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2012 Sep 16 0440 UTC
Valid To: 2012 Sep 16 0510 UTC
IP Shock Passage Observed: 2012 Sep 16 0350 UTC


Space Weather Message Code: ALTTP2
Serial Number: 822
Issue Time: 2012 Sep 15 2344 UTC

ALERT: Type II Radio Emission
Begin Time: 2012 Sep 15 2259 UTC
Estimated Velocity: 681 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: 1956
Issue Time: 2012 Sep 12 1407 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2012 Sep 12 1340 UTC
Station: GOES13
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: ALTEF3
Serial Number: 1955
Issue Time: 2012 Sep 10 1338 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1954
Begin Time: 2012 Sep 09 1520 UTC
Yesterday Maximum 2MeV Flux: 1420 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: ALTEF3
Serial Number: 1954
Issue Time: 2012 Sep 09 1540 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2012 Sep 09 1520 UTC
Station: GOES13
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: ALTK04
Serial Number: 1609
Issue Time: 2012 Sep 06 0204 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2012 Sep 06 0201 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: 2006
Issue Time: 2012 Sep 06 0140 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2012 Sep 06 0140 UTC
Valid To: 2012 Sep 06 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: WARK04
Serial Number: 2005
Issue Time: 2012 Sep 05 1154 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2004
Valid From: 2012 Sep 05 0027 UTC
Now Valid Until: 2012 Sep 05 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: WARK05
Serial Number: 800
Issue Time: 2012 Sep 05 0647 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 799
Valid From: 2012 Sep 05 0130 UTC
Now Valid Until: 2012 Sep 05 1200 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: ALTK06
Serial Number: 292
Issue Time: 2012 Sep 05 0240 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2012 Sep 05 0240 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
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: WARK06
Serial Number: 208
Issue Time: 2012 Sep 05 0239 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2012 Sep 05 0240 UTC
Valid To: 2012 Sep 05 0700 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate
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: ALTK05
Serial Number: 700
Issue Time: 2012 Sep 05 0148 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2012 Sep 05 0144 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: WARK05
Serial Number: 799
Issue Time: 2012 Sep 05 0135 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2012 Sep 05 0130 UTC
Valid To: 2012 Sep 05 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: 1608
Issue Time: 2012 Sep 05 0054 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2012 Sep 05 0050 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: 2004
Issue Time: 2012 Sep 05 0028 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2012 Sep 05 0027 UTC
Valid To: 2012 Sep 05 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: 63
Issue Time: 2012 Sep 04 1232 UTC

SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2012 Sep 01 1335 UTC
Maximum Time: 2012 Sep 02 0850 UTC
End Time: 2012 Sep 04 0625 UTC
Maximum 10MeV Flux: 59 pfu
NOAA Scale: S1 - Minor


Space Weather Message Code: WARPX1
Serial Number: 384
Issue Time: 2012 Sep 04 0645 UTC

EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 383
Valid From: 2012 Sep 01 1152 UTC
Now Valid Until: 2012 Sep 04 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: WARK04
Serial Number: 2003
Issue Time: 2012 Sep 04 0553 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2002
Valid From: 2012 Sep 02 1935 UTC
Now Valid Until: 2012 Sep 04 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: ALTK05
Serial Number: 699
Issue Time: 2012 Sep 03 2359 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2012 Sep 04 0000 UTC
Synoptic Period: 2100-2400 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: WARPX1
Serial Number: 383
Issue Time: 2012 Sep 03 2323 UTC

EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 382
Valid From: 2012 Sep 01 1152 UTC
Now Valid Until: 2012 Sep 04 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: WARK05
Serial Number: 798
Issue Time: 2012 Sep 03 2302 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2012 Sep 03 2300 UTC
Valid To: 2012 Sep 04 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: WARK04
Serial Number: 2002
Issue Time: 2012 Sep 03 2036 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2001
Valid From: 2012 Sep 02 1935 UTC
Now Valid Until: 2012 Sep 04 0600 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: 382
Issue Time: 2012 Sep 03 1749 UTC

EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 381
Valid From: 2012 Sep 01 1152 UTC
Now Valid Until: 2012 Sep 04 0000 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: ALTK06
Serial Number: 291
Issue Time: 2012 Sep 03 1503 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2012 Sep 03 1500 UTC
Synoptic Period: 1200-1500 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
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: WARK06
Serial Number: 207
Issue Time: 2012 Sep 03 1448 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2012 Sep 03 1448 UTC
Valid To: 2012 Sep 03 1800 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate
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: WARK05
Serial Number: 797
Issue Time: 2012 Sep 03 1446 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 796
Valid From: 2012 Sep 03 1145 UTC
Now Valid Until: 2012 Sep 03 2100 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: 2001
Issue Time: 2012 Sep 03 1445 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2000
Valid From: 2012 Sep 02 1935 UTC
Now Valid Until: 2012 Sep 03 2100 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: 698
Issue Time: 2012 Sep 03 1319 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2012 Sep 03 1312 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: SUMSUD
Serial Number: 158
Issue Time: 2012 Sep 03 1231 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2012 Sep 03 1214 UTC
Deviation: 28 nT
Station: Boulder


Space Weather Message Code: WARK05
Serial Number: 796
Issue Time: 2012 Sep 03 1138 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2012 Sep 03 1145 UTC
Valid To: 2012 Sep 03 1600 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: WARSUD
Serial Number: 116
Issue Time: 2012 Sep 03 1134 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2012 Sep 03 1206 UTC
Valid To: 2012 Sep 03 1236 UTC
IP Shock Passage Observed: 2012 Sep 03 1123 UTC


Space Weather Message Code: WARK04
Serial Number: 2000
Issue Time: 2012 Sep 03 0814 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 1999
Valid From: 2012 Sep 02 1935 UTC
Now Valid Until: 2012 Sep 03 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: 1999
Issue Time: 2012 Sep 03 0251 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 1998
Valid From: 2012 Sep 02 1935 UTC
Now Valid Until: 2012 Sep 03 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: ALTK04
Serial Number: 1607
Issue Time: 2012 Sep 02 2306 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2012 Sep 02 2305 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: 1998
Issue Time: 2012 Sep 02 1933 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2012 Sep 02 1935 UTC
Valid To: 2012 Sep 03 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: WARPX1
Serial Number: 381
Issue Time: 2012 Sep 02 1755 UTC

EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 380
Valid From: 2012 Sep 01 1152 UTC
Now Valid Until: 2012 Sep 03 1800 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: ALTTP4
Serial Number: 396
Issue Time: 2012 Sep 02 0824 UTC

ALERT: Type IV Radio Emission
Begin Time: 2012 Sep 02 0435 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: WARPX1
Serial Number: 380
Issue Time: 2012 Sep 02 0255 UTC

EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 379
Valid From: 2012 Sep 01 1152 UTC
Now Valid Until: 2012 Sep 02 1800 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: WATA30
Serial Number: 96
Issue Time: 2012 Sep 01 1536 UTC

WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day:
Sep 02: None (Below G1) Sep 03: G2 (Moderate) Sep 04: 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: ALTPX1
Serial Number: 296
Issue Time: 2012 Sep 01 1349 UTC

ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2012 Sep 01 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: 379
Issue Time: 2012 Sep 01 1151 UTC

WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2012 Sep 01 1152 UTC
Valid To: 2012 Sep 02 0300 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.