Sudden Impulse and a Kp4

Space Weather Message Code: WARK04
Serial Number: 2048
Issue Time: 2013 Feb 16 1713 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2013 Feb 16 1711 UTC
Valid To: 2013 Feb 16 2359 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.


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Space Weather Message Code: SUMSUD
Serial Number: 167
Issue Time: 2013 Feb 16 1217 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2013 Feb 16 1210 UTC
Deviation: 10 nT
Station: Boulder


[link to www.swpc.noaa.gov]

expected events timeline
[link to www.swpc.noaa.gov]