
A geomagetic storm triggered Northern Lights as unusually far south as Arizona last night. The cause: a mass ejection from the sun which hit Earth squarely on Thursday. Our planet’s magnetic field reverberated for more than 24 hours after the impact. A second one is due today, but is only expected to be a glancing hit, so it probably won’t cause auroras so far south/ photo by Vic Winters.
Via Spaceweather.com















