Friday, October 13, 2017

ALERT: Geomagnetic K-index of 6

Space Weather Message Code: ALTK06 Serial Number: 453 Issue Time: 2017 Oct 13 1500 UTC

ALERT: Geomagnetic K-index of 6

Threshold Reached: 2017 Oct 13 1459 UTC Synoptic Period: 1200-1500 UTC

Active Warning: Yes 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

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