Overview
- Auroras were photographed Tuesday night in multiple U.S. locations, including Massachusetts, Minnesota, the Kansas City area, Ohio and Montana.
- NOAA’s Space Weather Prediction Center posted a G4 (severe) watch for Nov. 12 following several CMEs, with another strong (G3) period forecast for Nov. 13.
- Forecasters say roughly 21 states fall within the aurora view line, with potential visibility reaching as far south as Alabama and Northern California depending on conditions.
- Officials caution that severe geomagnetic activity can cause voltage control problems on power grids and anomalies in satellite, GPS and radio operations.
- Viewing is most likely from about 10 p.m. to 2 a.m. local time, and confidence on timing and intensity improves only after solar-wind monitors detect the CME 15–60 minutes before arrival.