Issue Time: 2015 Oct 07 1852 UTC
WARNING: Geomagnetic K-index of 7 or greater expected
Valid From: 2015 Oct 07 1850 UTC
Valid To: 2015 Oct 08 0700 UTC
Warning Condition: Onset
NOAA Scale: G3 or greater – Strong to Extreme
Also an active alert
Issue Time: 2015 Oct 07 1700 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2015 Oct 07 1659 UTC
Synoptic Period: 1500-1800 UTC
Active Warning: Yes
NOAA Scale: G2 – Moderate
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.
This post compiled using data gathered from NOAA and NASA.