Thursday, August 17, 2017

WARNING: Geomagnetic K-Index of 6 expected

Space Weather Message Code: WARK06 Serial Number: 391 Issue Time: 2017 Aug 17 1151 UTC

WARNING: Geomagnetic K-Index of 6

Valid From: 2017 Aug 17 1150 UTC Valid To: 2017 Aug 17 1500 UTC

Warning Condition: Onset NOAA Scale: G2 - Moderate NOAA Space Weather

Scale descriptions can be found at

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.

Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes.

Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

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