Summary and Forecast

Solar Summary

(last updated 07 Aug 2026 23:30 UT)

Activity 07 Aug: R0 Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 07 Aug: 97/44

Solar Forecast

(last updated 07 Aug 2026 23:30 UT)

08 Aug 09 Aug 10 Aug Activity R0 R0 R0 Fadeouts None expected None expected None expected 10.7cm/SSN 95/41 90/34 90/34 COMMENT: Solar flare activity on UT day 07-Aug was at the R0 level, with no significant flares observed. There are currently four active regions visible on the solar disk. All are simple, stable and quiet and three of these regions are expected to rotate off the visible disk over the next 24 hours. Solar flare activity is forecast to be at the R0 level over 08-10 Aug due to a lack of complex active regions. Solar radiation storm conditions were at the S0 level on 07-Aug and are forecast to remain at this level over 08-10 Aug. No Earth-directed coronal mass ejections (CMEs) were observed on 07-Aug. An east directed CME was visible from 07/0636UT in SOHO and STEREO-A imagery. This CME is associated with an eruption over the eastern limb visible from 07/0545UT in GOES SUVI and SDO imagery. This CME is not considered geoeffective. The solar wind speed was low and steady over 07-Aug, mostly ranging between 275 km/s and 255 km/s and is currently at around 260 km/s. The interplanetary magnetic field strength (IMF, Bt) peaked at 6 nT at 07/1120UT. Potentially indicating the anticipated arrival of a glancing CME. The north south component (Bz) ranged between +3 and -4 nT. A slight increase in the solar wind speed is possible on 08-Aug due to a potential glancing impact from a CME first observed on 04-Aug. Otherwise, solar wind speed is expected to remain near background levels over 08-10 Aug, with the possibility of a slight increase on 10-Aug due to a series of small coronal holes rotating towards a geoeffective position.

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