Summary and Forecast

Solar Summary

(last updated 28 Jan 2026 23:30 UT)

Activity 28 Jan: R0 Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 28 Jan: 133/87

Solar Forecast

(last updated 28 Jan 2026 23:30 UT)

29 Jan 30 Jan 31 Jan Activity R0, Chance R1 R0, Chance R1 R0, Chance R1 Fadeouts Possible Possible Possible 10.7cm/SSN 130/84 120/72 110/60 COMMENT: Solar flare activity was at the R0 level on UT day 28-Jan. There are currently eight numbered sunspot regions visible on the solar disk. Active Region (AR) 4349 (S14E44, alpha) is currently the largest region on the solar disk but is showing simple magnetic complexity. AR4357 (S13W17, beta) has shown mild growth over the UT day. All other regions appear stable or in decay. Solar flare activity is expected to remain at the R0 level, with a chance of R1 over 29-31 Jan. Solar radiation storm conditions were at the S0 level on UT day 28-Jan. S0 conditions are expected for 29-31 Jan. No Earth-directed coronal mass ejections were observed over the past 24 hours. The solar wind speed ranged between 650-450 km/s across the UT day and is currently 630 km/s. The interplanetary magnetic field strength (IMF, Bt) peaked at 13 nT during 28-Jan, with the North-South component (Bz) ranging between -12 and +12 nT over the last UT day. The solar wind speed is expected to remain mildly elevated over 29-30 Jan, due to coronal hole high speed wind stream effects. The solar wind speed is expected to return to background levels on 31-Jan.

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