THE CME HAS ARRIVED: A coronal mass ejection (CME) hit Earth’s magnetic field on Feb. 1st at 22:21 UT, a few hours earlier than predicted. First-look data from NOAA’s DSCOVR spacecraft suggest that conditions are favorable for a G1-class geomagnetic storm, but maybe not the stronger G2-class storm originally predicted. High-latitude sky watchers should be alert for auroras after local nightfall.

Ydun Ritz (2022-02-02)