Summary and Forecast

Solar Summary

(last updated 28 Aug 2026 23:30 UT)

Activity 28 Aug: R0 Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 28 Aug: 116/68

Solar Forecast

(last updated 28 Aug 2026 23:30 UT)

29 Aug 30 Aug 31 Aug Activity R0 R0 R0 Fadeouts None expected None expected None expected 10.7cm/SSN 116/68 112/63 110/60 COMMENT: Solar activity on UT day 28-Aug was R0, with no solar flares. There are currently five numbered sunspot regions on the solar disk, however all are stable. Active region (AR) 4513 (N04W45, beta) has significantly reduced in complexity. Solar activity is expected to be R0 over 19-31 Aug. No Earth directed CMEs were observed on UT day 28-Aug. S0 solar radiation storm conditions were observed on UT day 28-Aug. S0 solar radiation storm conditions are expected over 29-31 Aug. The solar wind environment on UT day 28-Aug was mildly disturbed towards the end of the day, possibly due to the anticipated CME arrivals from 1400 UT, although the signature is not strong. The solar wind speed ranged from 250 to 380 km/s. The peak total interplanetary field strength (IMF, Bt) was 14 nT and the north-south IMF component range (Bz) was +10 to -13 nT. Several periods of southward Bz were observed towards the end of the day. Some intermittent coronal hole connections are possible over 29-31 Aug to briefly enhance the solar wind speed, but in general the solar wind is expected to be near background levels.

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