NOAA / Space Weather Prediction Center

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Space Weather Alerts

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Alerts Issued in December 2011


Space Weather Message Code: SUM10R
Serial Number: 523
Issue Time: 2011 Dec 31 1348 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2011 Dec 31 1312 UTC
Maximum Time: 2011 Dec 31 1313 UTC
End Time: 2011 Dec 31 1313 UTC
Duration: 1 minutes
Peak Flux: 150 sfu
Latest Penticton Noon Flux: 141 sfu


Space Weather Message Code: WARK04
Serial Number: 1848
Issue Time: 2011 Dec 29 1038 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2011 Dec 29 1037 UTC
Valid To: 2011 Dec 29 1800 UTC
Warning Condition: Onset


Space Weather Message Code: SUMSUD
Serial Number: 139
Issue Time: 2011 Dec 28 1128 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2011 Dec 28 1114 UTC
Deviation: 7 nT
Station: Boulder


Space Weather Message Code: WARSUD
Serial Number: 96
Issue Time: 2011 Dec 28 1027 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2011 Dec 28 1100 UTC
Valid To: 2011 Dec 28 1200 UTC
IP Shock Passage Observed: 2011 Dec 28 0956 UTC


Space Weather Message Code: WATA20
Serial Number: 482
Issue Time: 2011 Dec 27 1431 UTC

WATCH: Geomagnetic A-index of 20 or greater predicted
NOAA Scale: Periods reaching the G1 (Minor) Level Likely
Valid for UTC Day: 2011 Dec 29


Space Weather Message Code: SUM10R
Serial Number: 522
Issue Time: 2011 Dec 27 0438 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2011 Dec 27 0416 UTC
Maximum Time: 2011 Dec 27 0421 UTC
End Time: 2011 Dec 27 0421 UTC
Duration: 5 minutes
Peak Flux: 5100 sfu
Latest Penticton Noon Flux: 146 sfu


Space Weather Message Code: ALTTP4
Serial Number: 355
Issue Time: 2011 Dec 25 1943 UTC

ALERT: Type IV Radio Emission
Begin Time: 2011 Dec 25 1817 UTC


Space Weather Message Code: ALTTP2
Serial Number: 771
Issue Time: 2011 Dec 25 1911 UTC

ALERT: Type II Radio Emission
Begin Time: 2011 Dec 25 1820 UTC
Estimated Velocity: 1019 km/s


Space Weather Message Code: ALTTP4
Serial Number: 354
Issue Time: 2011 Dec 22 0346 UTC

ALERT: Type IV Radio Emission
Begin Time: 2011 Dec 22 0212 UTC


Space Weather Message Code: ALTTP2
Serial Number: 770
Issue Time: 2011 Dec 22 0343 UTC

ALERT: Type II Radio Emission
Begin Time: 2011 Dec 22 0204 UTC
Estimated Velocity: 921 km/s


Space Weather Message Code: WARK04
Serial Number: 1847
Issue Time: 2011 Dec 10 0752 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2011 Dec 10 0751 UTC
Valid To: 2011 Dec 10 1200 UTC
Warning Condition: Onset


Space Weather Message Code: WARK04
Serial Number: 1846
Issue Time: 2011 Dec 03 0025 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2011 Dec 03 0130 UTC
Valid To: 2011 Dec 03 0600 UTC
Warning Condition: Onset