From: Spaceweather.com

CME IMPACT: A coronal mass ejection (CME) hit Earth’s magnetic field on March 8th around 1100 UT. The impact was weaker than expected, sparking only a mild (Kp=5) geomagnetic storm. However, the storm could intensify in the hours ahead depending on electromagnetic conditions in the wake of the CME. High-latitude sky watchers should be alert for auroras. Aurora alerts: text, phone.