Summary and Forecast
Solar Summary
(last updated 24 Aug 2025 23:30 UT)
Activity 24 Aug: R1 Flares Max Fadeout Freq. Sectors M1.3 0836UT possible lower Mid East/Indian Observed 10.7 cm flux/Equivalent Sunspot Number for 24 Aug: 152/107
Solar Forecast
(last updated 24 Aug 2025 23:30 UT)
25 Aug 26 Aug 27 Aug Activity R0-R1 R0-R1 R0-R1 Fadeouts Possible Possible Possible 10.7cm/SSN 152/107 152/107 155/109 COMMENT: Solar activity on UT day 24-Aug was at the R1 level, due to an M1.3 flare at 24/0836UT from over the eastern limb. There are currently six numbered sunspot regions visible on the solar disk, however analysis was difficult due to lack of imagery. AR4191 (N13E31, beta) is the largest region on the solar disk. Newly numbered region AR4194 (N03E15, beta) showed spot development over the UT day. All other sunspot regions are either stable or in decay. Solar activity is expected to be at R0-R1 levels over 25-27 Aug. Solar proton conditions were enhanced but below the S1 level on UT day 24-Aug. S0-S1 solar proton conditions are expected over 25-27 Aug. No Earth-directed CMEs were observed on 24-Aug. A north directed, narrow CME was observed in SOHO and STEREO-A imagery from 24/0248UT, there is no clear on disk activity associated with this CME and it is not considered geoeffective. A northeast directed, narrow CME was oberved in SOHO and STEREO-A imagery from 24/1036UT, an eruption behind the solar limb is visible in SDO and GOES SUVI imagery from 24/0936UT and is likely associated with this CME. This CME is expected to pass behind the Earth. The solar wind speed on UT day 24-Aug was mostly steady, ranging between 360 to 450 km/s and is currently near 375 km/s. The peak total interplanetary magnetic field strength (IMF, Bt) was 9 nT and the north-south IMF component (Bz) range was -4 to +6 nT. The solar wind speed is expected to be mostly steady on 25-Aug until a possible increase late in the day due to two possible glancing CME impacts. A further increase is expected on 26-27 Aug due to high speed solar wind stream effects from a northern hemisphere coronal hole.
Solar Activity levels are explained in the SWS Solar Terrestrial Glossary.
