Summary and Forecast

Solar Summary

(last updated 24 Jan 2026 23:30 UT)

Activity 24 Jan: R0 Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 24 Jan: 174/128

Solar Forecast

(last updated 24 Jan 2026 23:30 UT)

25 Jan 26 Jan 27 Jan Activity R0, chance R1 R0, chance R1 R0, chance R1 Fadeouts None expected None expected None expected 10.7cm/SSN 175/129 170/124 160/114 COMMENT: Solar flare activity on UT day 24-Jan was at the R0 level, with no significant flaring activity. There are currently nine numbered sunspot regions visible on the solar disk. AR4349 (S14E14, beta) is the largest region on the disk and has shown mild growth in its trailer spots. AR4353 (N18W11, beta) has exhibited spot growth over the UT day. Newly numbered AR4355 (S12E46, beta) has shown growth in its trailer spot. All other sunspot regions are either stable or in decay. Solar flare activity is expected to be at the R0 level over 25-27 Jan, with a chance of R1. S0 solar proton conditions were observed on UT day 24-Jan, with the proton flux continuing a gradual decline over the UT day. S0 solar proton conditions are expected over 25-27 Jan, with a chance of S1. No Earth-directed CMEs have been observed in the available coronagraph imagery. The solar wind speed on UT day 24-Jan mildly declined, ranging from 490 to 570 km/s and is currently near 535 km/s. The peak total interplanetary magnetic field strength (IMF, Bt) was 8 nT and the north-south IMF component (Bz) range was -6 to +6 nT. A small northern hemisphere coronal hole is currently crossing the central meridian and may influence the solar wind speed late on 27-Jan. The solar wind speed is expected to decrease over 25-26 Jan, then mildly increase on 27-Jan.

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