Overview
- Auroras were photographed from the Baltic coast to Bavaria, with Alpine webcams recording bright displays between 4:00 and 5:00 a.m., and sightings extended as far south as Florida, Texas, Arizona and Alabama in the United States.
- Instruments logged a Ground Level Event and very high Kp readings up to about 8.7, a combination experts say occurs only once or twice per 11‑year solar cycle.
- ESA’s Space Safety program reported signal interruptions in sunlit regions of Europe, Africa and Asia, and agencies cautioned that GPS navigation and HF radio could be disrupted, though widespread power‑grid failures were not reported.
- The Deutsches Zentrum für Luft- und Raumfahrt and astronomers say aurora remains possible through Thursday night into Friday, with visibility dependent on evolving storm strength, cloud cover and even Saharan dust; observers are advised to look north and note that smartphone night modes can reveal faint glows.
- The event follows multiple CMEs observed on November 9–10, with NOAA’s SWPC forecasting G2–G3–G1 storm days for November 11–13 during the solar cycle’s active phase.