Surprise! A strong (G3) geomagnetic storm is currently in progress thanks to an enhanced solar wind stream containing a sharply south pointing Bz. Visible aurora is likely at middle to high latitudes if it is still dark outside.
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2019 May 14 0859 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G3 – Strong
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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