Issue Time: 2013 Mar 15 1712 UTC
WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day:
Mar 16: G1 (Minor) Mar 17: G2 (Moderate) Mar 18: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
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.
Issue Time: 2013 Mar 15 1220 UTC
A coronal mass ejection (CME) hit Earth’s magnetic field on March 15th at approximately 0500 UT. The impact was not strong but could induce a geomagnetic storm. Aurora watches should be on the alert for good viewing March 15/16.
ALERT: Type IV Radio Emission
Begin Time: 2013 Mar 15 0620 UTC