From: Space Weather Prediction Center (NOAA)
Posted: Sunday, September 30, 2012
Space Weather Message Code: WARK07
Serial Number: 40
Issue Time: 2012 Oct 01 0243 UTC
WARNING: Geomagnetic K-index of 7 or greater expected
Valid From: 2012 Oct 01 0245 UTC
Valid To: 2012 Oct 01 0600 UTC
Warning Condition: Onset
NOAA Scale: G3 or greater - Strong to Extreme
Comment: This warning upgrades the previous G2 warning.
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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