ALERT: Geomagnetic Storm for 2011 Apr 06

Space Weather Message Code: ALTK04
Serial Number: 1503
Issue Time: 2011 Apr 06 1059 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2011 Apr 06 1058 UTC
Synoptic Period: 0300-0600 UTC
Station: Boulder
Active Warning: Yes


Space Weather Message Code: WARSUD
Serial Number: 79
Issue Time: 2011 Apr 06 0926 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2011 Apr 06 0940 UTC
Valid To: 2011 Apr 06 1045 UTC
IP Shock Passage Observed: 2011 Apr 06 0853 UTC