Solar activity has been at low levels over the past 24 hours, with two numbered sunspot regions currently on the disk, according to the joint USAF/NOAA Solar Geophysical Activity Report and Forecast issued at 2200Z on 30 September 2026.
Solar activity is expected to remain very low, with a chance for C-class flares and a slight chance for an M-class flare on days one, two and three (1, 2 and 3 October), the report said. Event probabilities for an M-class flare were listed at 15 percent on each of the three days, while X-class and proton probabilities were each 1 percent. The Penticton 10.7 cm flux was observed at 093 on 30 September, with predictions of 095/095/090 for 1-3 October against a 90-day mean of 117.
The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed peaked at 310 km/s at 30/1713Z, total IMF reached 5 nT at 30/0224Z, and the maximum southward component of Bz reached -2 nT at 29/2109Z. Electrons greater than 2 MeV at geosynchronous orbit peaked at 3120 pfu.
The geomagnetic field is expected to be at quiet levels on day one (1 October), quiet to minor storm levels on day two (2 October) and quiet to active levels on day three (3 October). At middle latitudes, minor storm probabilities were given as 05/15/10, and at high latitudes as 15/20/20. The PCAF status is green.