Summary and Forecast

Solar Summary

(last updated 23 Nov 2025 23:30 UT)

Activity 23 Nov: R0 Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 23 Nov: 120/72

Solar Forecast

(last updated 23 Nov 2025 23:30 UT)

24 Nov 25 Nov 26 Nov Activity R0, chance R1 R0, chance R1 R0, chance R1 Fadeouts None expected None expected None expected 10.7cm/SSN 125/78 125/78 130/84 COMMENT: Solar activity was at the R0 level for the UT day 23-Nov, with no significant flare events observed in the last 24 hours. There are currently five numbered regions on the visible solar disk, with Active Regions 4290 (S09E47, Beta) and 4291 (S14E54, Beta-Delta) being the largest and most magnetically complex. Both of these regions, lying in proximity to each other, have shown some growth over the previous UT day. New Active Region 4292 appeared on the surface near (S16E01), and has a beta magnetic classification. A new unnumbered region also appeared at (N10E62). This region appears to exhibit a Beta magnetic classification, but is somewhat affected by foreshortening. All other regions appear mostly stable. Solar activity is expected to remain at the R0 level over UT days Nov 24-26, with a chance of R1 based on the growth of Active Regions 4290 and 4291. Solar radiation storm conditions were at the S0 level during UT day 23-Nov, and S0 conditions are forecast to continue over the period 24-26 Nov. There were no geoeffective Coronal Mass Ejections observed over the past UT day. The solar wind speed has gradually increased over the past last 24 hours, broadly ranging between 360-460 km/s, and is currently at 460 km/s. The interplanetary magnetic field strength (IMF, Bt) peaked at 14 nT during 23-Nov, with the North-South component (Bz) ranging between -9 and +12 nT. The solar wind speed is forecast to further increase due to high speed wind effects as an equatorial coronal hole continues to rotate into a geoeffective position.

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