NOAA / Space Weather Prediction Center

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Space Weather Alerts

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Alerts in Graphical Timelines: Past 7 days and Currently in Effect
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Alerts Issued in October 2009


Space Weather Message Code: ALTK04
Serial Number: 1427
Issue Time: 2009 Oct 30 0714 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2009 Oct 30 0713 UTC
Synoptic Period: 0600-0900 UTC
Station: Boulder
Active Warning: Yes


Space Weather Message Code: WARK04
Serial Number: 1597
Issue Time: 2009 Oct 30 0708 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2009 Oct 30 0708 UTC
Valid To: 2009 Oct 30 1600 UTC
Warning Condition: Onset


Space Weather Message Code: ALTK04
Serial Number: 1426
Issue Time: 2009 Oct 30 0437 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2009 Oct 30 0437 UTC
Synoptic Period: 0300-0600 UTC
Station: Boulder
Active Warning: No


Space Weather Message Code: WARK04
Serial Number: 1596
Issue Time: 2009 Oct 24 2340 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 1595
Valid From: 2009 Oct 24 2020 UTC
Now Valid Until: 2009 Oct 25 1600 UTC
Warning Condition: Onset


Space Weather Message Code: WARK04
Serial Number: 1595
Issue Time: 2009 Oct 24 2016 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2009 Oct 24 2020 UTC
Valid To: 2009 Oct 24 2359 UTC
Warning Condition: Onset


Space Weather Message Code: SUMSUD
Serial Number: 102
Issue Time: 2009 Oct 24 0704 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2009 Oct 24 0702 UTC
Deviation: 17 nT
Station: Boulder


Space Weather Message Code: ALTK04
Serial Number: 1425
Issue Time: 2009 Oct 23 0130 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2009 Oct 23 0130 UTC
Synoptic Period: 0000-0300 UTC
Station: Boulder
Active Warning: Yes


Space Weather Message Code: WARK04
Serial Number: 1594
Issue Time: 2009 Oct 23 0126 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2009 Oct 23 0126 UTC
Valid To: 2009 Oct 23 1600 UTC
Warning Condition: Onset


Space Weather Message Code: ALTK05
Serial Number: 632
Issue Time: 2009 Oct 22 1058 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2009 Oct 22 1057 UTC
Synoptic Period: 0900-1200 UTC
Station: Boulder
Active Warning: Yes
NOAA Scale: G1 - Minor


Space Weather Message Code: WARK05
Serial Number: 649
Issue Time: 2009 Oct 22 1053 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2009 Oct 22 1053 UTC
Valid To: 2009 Oct 22 1600 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor


Space Weather Message Code: ALTK04
Serial Number: 1424
Issue Time: 2009 Oct 22 1042 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2009 Oct 22 1041 UTC
Synoptic Period: 0900-1200 UTC
Station: Boulder
Active Warning: No


Space Weather Message Code: SUMSUD
Serial Number: 101
Issue Time: 2009 Oct 22 0031 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2009 Oct 22 0019 UTC
Deviation: 11 nT
Station: Boulder


Space Weather Message Code: SUMSUD
Serial Number: 100
Issue Time: 2009 Oct 11 0730 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2009 Oct 11 0718 UTC
Deviation: 23 nT
Station: Boulder


Space Weather Message Code: SUMSUD
Serial Number: 99
Issue Time: 2009 Oct 11 0050 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2002 Oct 11 0042 UTC
Deviation: 9 nT
Station: Boulder


Space Weather Message Code: SUMSUD
Serial Number: 98
Issue Time: 2009 Oct 04 0517 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2009 Oct 04 0422 UTC
Deviation: 18 nT
Station: Boulder