Boulder, CO – The NOAA Space Weather Prediction Center has issued a G3 (Strong) Geomagnetic Storm Watch for Tuesday night through Wednesday, November 11–12, as multiple Coronal Mass Ejections (CMEs) from recent solar flares are expected to impact Earth.
Two significant CMEs erupted from the Sun on November 9 and 10, following an X1.2-class solar flare. The first eruption is expected to reach Earth late Tuesday evening, with a second, faster-moving CME anticipated to arrive by early Wednesday morning.
According to NOAA, the combined effects could trigger moderate to strong geomagnetic storms (G2–G3 level) capable of producing auroras visible as far south as Oregon, the northern Plains, and parts of the Midwest. The agency notes there is moderate confidence in timing but warns that conditions could fluctuate depending on the solar wind’s orientation.
While impacts to technology are expected to be minor and manageable, NOAA advises that satellite communications, GPS, and power grid systems may experience brief disruptions. Skywatchers are encouraged to stay updated and monitor spaceweather.gov for viewing conditions and forecast updates.
