Summary and Forecast

Solar Summary

(last updated 23 Jan 2026 23:30 UT)

Activity 23 Jan: R0 Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 23 Jan: 180/133

Solar Forecast

(last updated 23 Jan 2026 23:30 UT)

24 Jan 25 Jan 26 Jan Activity R0-R1 R0-R1 R0-R1 Fadeouts Possible Possible Possible 10.7cm/SSN 185/138 190/143 185/138 COMMENT: Solar flare activity on UT day 23-Jan was at the R0 level, with several C-class flares observed. There are currently eight numbered sunspot regions and one unnumbered region visible on the solar disk. AR4349 (S14E28, beta) is the largest region on the disk and has exhibited growth in its trailer spots over the UT day. An unnumbered region recently appeared near S09E52 (alpha) and is stable. All other sunspot regions are either stable or in decay. Solar flare activity is expected to be at R0-R1 levels over 24-26 Jan. S0 solar proton conditions were observed on UT day 23-Jan, with the proton flux continuing a gradual decline over the UT day. S0 solar proton conditions are expected over 24-26 Jan, with a chance of S1. No Earth-directed coronal mass ejections (CMEs) have been observed. A south-directed CME was observed, visible in LASCO C2 coronagraph imagery at 23/1524UT. This CME is considered a farside event and not geoeffective. A southeast-directed CME was observed at 23/1812UT. This CME is likely associated with a limb prominence eruption visible in GOES SUVI imagery from 23/1444UT and is not considered geoeffective. The solar wind speed on UT day 23-Jan mildly increased, ranging from 490 to 610 km/s and is currently near 550 km/s. The peak total interplanetary magnetic field strength (IMF, Bt) was 9 nT and the north-south IMF component (Bz) range was -8 to +6 nT. The solar wind speed is expected to remain elevated over 24-26 Jan.

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