Summary and Forecast

Solar Summary

(last updated 10 Feb 2026 23:30 UT)

Activity 10 Feb: R0 Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 10 Feb: 142/96

Solar Forecast

(last updated 10 Feb 2026 23:30 UT)

11 Feb 12 Feb 13 Feb Activity R0-R1 R0-R1 R0-R1 Fadeouts Possible Possible Possible 10.7cm/SSN 145/99 140/94 140/94 COMMENT: Solar flare activity was at the R0 level on UT day 10-Feb with no notable flares. There are currently seven numbered sunspot regions visible on the solar disk. AR4366 (N16W85, beta-gamma-delta) remains the largest and most magnetically complex region on the solar disk but will rotate off the visible disk on 11-Feb. All other regions appear either stable or in decay. Solar flare activity is expected to be at R0-R1 levels over 11-13 Feb. Solar radiation storm conditions were at the S0 level on 10-Feb. Solar radiation storm conditions are expected to be at the S0 level over 11-13 Feb. No Earth-directed CMEs were observed over the UT day. A filament lift off is visible from 10/1441UT in H-Alpha, GOES SUVI and SDO imagery at around N10W20-30. No associated CME is visible in available coronagraph imagery and most of the ejected material appears directed well to the west. The solar wind speed increased slightly over 10-Feb, mostly ranging between 380 to 510 km/s . The wind speed is currently at around 460 km/s. The interplanetary magnetic field strength (IMF, Bt) peaked at 9 nT, with the North-South component (Bz) ranging between -7 and +6 nT over the UT day. The solar wind speed is expected to remain near background levels over 11-13 Feb.

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