Solar flux 186 and estimated planetary A-index 2. The estimated planetary K-index at 1500 UTC on 09 December was 1.33. Space weather for the past 24 hours h

Forecast Issued at 2200Z on 08 Dec 2025

Solar Activity Forecast: Solar activity is likely to be moderate with a slight chance for an X-class flare on days one, two, and three (09 Dec, 10 Dec, 11 Dec).

Geophysical Activity Forecast: The geomagnetic field is expected to be at active to severe storm levels on day one (09 Dec), quiet to minor storm levels on day two (10 Dec) and quiet to unsettled levels on day three (11 Dec). Protons have a slight chance of crossing threshold on days one, two, and three (09 Dec, 10 Dec, 11 Dec).