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WARNING: Geomagnetic K-index of 7 or greater (G3 or Greater)

Status Report From: Space Weather Prediction Center (NOAA)
Posted: Friday, September 12, 2014

Space Weather Message Code: WARK07
Serial Number: 43
Issue Time: 2014 Sep 12 2307 UTC

WARNING: Geomagnetic K-index of 7 or greater expected
Valid From: 2014 Sep 12 2306 UTC
Valid To: 2014 Sep 13 0700 UTC
Warning Condition: Persistence
NOAA Scale: G3 or greater - Strong to Extreme

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/NOAAscales

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

 

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