2015 Mar 17 2148 UTC SWPC Space Weather Alerts Issued in the last 24 hours Space Weather Message Code ALTK07 Serial Number: 92 Issue Time: 2015 Mar 17 2034 UTC ALERT: Geomagnetic K-index of 7 Threshold Reached: 2015 Mar 17 2030 UTC Synoptic Period: 1800-2100 UTC Active Warning: Yes NOAA Scale: G3 - Strong www.swpc.noaa.gov/noaa-scales-explanation 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.