Solar flux 161 and estimated planetary A-index 4. The estimated planetary K-index at 0600 UTC on 17 October was 1.67. Space weather for the past 24 hours has

Forecast Issued at 2200Z on 16 Oct 2025

Solar Activity Forecast: Solar activity is likely to be moderate with a slight chance for an X-class flare on days one and two (17 Oct, 18 Oct) and expected to be low with a chance for M-class flares on day three (19 Oct).

Geophysical Activity Forecast: The geomagnetic field is expected to be at unsettled to minor storm levels on day one (17 Oct) and quiet to active levels on days two and three (18 Oct, 19 Oct). Protons greater than 10 Mev have a slight chance of crossing threshold on days one and two (17 Oct, 18 Oct).