Summary and Forecast

Solar Summary

(last updated 30 Aug 2026 23:30 UT)

Activity 30 Aug: R0 Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 30 Aug: 107/57

Solar Forecast

(last updated 30 Aug 2026 23:30 UT)

31 Aug 01 Sep 02 Sep Activity R0 R0 R0 Fadeouts None expected None expected None expected 10.7cm/SSN 109/59 105/54 105/54 COMMENT: Solar flare activity on UT day 30-Aug was R0, with no significant flares. There are currently six numbered sunspot regions on the solar disk. Active region (AR) 4513 (N04W71, beta) has developed some trailing spots, but is not expected to resume producing flares. AR 4520 (N08W06, beta) grew over the past day but has since stabilised. All other sunspot regions are either stable or in decay. Solar activity is expected to be R0 over 31-Aug and 1-2 Sep. A CME was observed from 1326 UT launching from the northern solar hemisphere associated with a filament eruption. This CME may have a weak arrival on 3-Sep. No other Earth-directed CMEs were observed on UT day 30-Aug. S0 solar radiation conditions were observed on UT day 30-Aug. S0 solar radiation storm conditions are expected over 31-Aug and 1-2 Sep. The solar wind environment on UT day 30-Aug was initially disturbed due to ongoing CME and coronal hole effects, but began returning to background levels in the second half of the day. The solar wind speed ranged from 400-500 km/s. The peak total interplanetary field strength (IMF, Bt) was 12 nT and the north-south IMF component range (Bz) +8 to -9 nT. The solar wind environment is expected to be mostly near background conditions over 31-Aug and 1-2 Sep, with some brief enhancements possible as a thin and fragmented coronal hole crosses the western hemisphere.

Solar Activity levels are explained in the SWS Solar Terrestrial Glossary.