Solar flux 111 and estimated planetary A-index 5. The estimated planetary K-index at 2100 UTC on 17 March was 1.00. Space weather for the past 24 hours has been minor. Radio blackouts reaching the R1 level occurred.

Forecast Issued at 2200Z on 17 Mar 2026

Solar Activity Forecast: Solar activity is expected to be low with a chance for M-class flares on days one, two, and three (18 Mar, 19 Mar, 20 Mar).

Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to unsettled levels on day one (18 Mar), quiet to major storm levels on day two (19 Mar) and unsettled to minor storm levels on day three (20 Mar). Protons greater than 10 Mev have a slight chance of crossing threshold on days two and three (19 Mar, 20 Mar).