Solar flux 209 and estimated planetary A-index 33. The estimated planetary K-index at 1500 UTC on 04 December was 4.00. Space weather for the past 24 hours has been moderate. Geomagnetic storms reaching the G1 level o

Forecast Issued at 2235Z on 03 Dec 2025

Solar Activity Forecast: Solar activity is expected to be moderate with a chance for X-class flares on days one, two, and three (04 Dec, 05 Dec, 06 Dec).

Geophysical Activity Forecast: The geomagnetic field is expected to be at major to strong storm levels on day one (04 Dec), active to major storm levels on day two (05 Dec) and active levels on day three (06 Dec). Protons have a slight chance of crossing threshold on days one, two, and three (04 Dec, 05 Dec, 06 Dec).