Aurora activity is expected to peak tonight following the arrival of a coronal mass ejection (CME) late on December 10, triggering a moderate (G2) geomagnetic storm. According to NOAA and the U.K. Met Office, G1–G2 auroral activity may persist into December 11, potentially amplified by smaller CMEs. Although conditions may stabilize thereafter, another surge in aurora activity is anticipated around December 12 as Earth nears a high-speed solar wind stream emanating from a coronal hole, expected on December 13.