Overview
- NASA’s Solar Dynamics Observatory recorded an X1.9 solar flare on Nov. 30 followed by a Dec. 1 coronal mass ejection expected to intersect Earth tangentially.
- NOAA forecasts geomagnetic conditions could reach G2, a moderate level on the G1–G5 scale, during Dec. 3–4.
- Forecasters note the exact onset and duration are unclear as space‑weather models carry timing uncertainties.
- Potential impacts include degraded GPS accuracy, satellite disturbances, high‑frequency radio issues for aviation, and adjustments on electrical grids.
- Auroras could extend to about 55° geomagnetic latitude, with viewing possible across the northern U.S., southern Canada, parts of northern Europe and New Zealand’s South Island, while Mexico is not expected to be affected.