Summary and Forecast

Solar Summary

(last updated 30 Jan 2026 23:30 UT)

Activity 30 Jan: R0 Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 30 Jan: 128/81

Solar Forecast

(last updated 30 Jan 2026 23:30 UT)

31 Jan 01 Feb 02 Feb Activity R0, chance of R1 R0, chance of R1 R0, chance of R1 Fadeouts None expected None expected None expected 10.7cm/SSN 125/78 120/72 115/66 COMMENT: Solar flare activity was at the R0 level on UT day 30-Jan. With no significant flares. There are currently seven numbered and one unnumbered sunspot regions visible on the solar disk. AR4359 (N20E04, beta) showed some mild spot development over the UT day. A developing unnumbered region is visible at around N18E68 with beta magnetic characteristics, this is the most significant sunspot region on the solar disk. 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 31-Jan to 02-Feb. Solar radiation storm conditions were at the S0 level on UT day 30-Jan, despite mild enhancements in the >10 MeV proton flux as measured at GOES. S0 conditions are expected over 31-Jan to 02-Feb. No Earth-directed coronal mass ejections were observed over the past 24 hours. The solar wind speed was in decline on 30-Jan and mostly ranged between 640 km/s and 480 km/s across the UT day and is currently near 485 km/s. The interplanetary magnetic field strength (IMF, Bt) peaked at 4 nT, with the North-South component (Bz) ranging between -2 and +3 nT over the UT day. The solar wind speed is expected to continue to decline towards background levels as coronal hole high speed wind stream effects wane.

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