Summary and Forecast

Solar Summary

(last updated 07 Oct 2026 23:30 UT)

Activity 07 Oct: R0 Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 07 Oct: 114/65

Solar Forecast

(last updated 07 Oct 2026 23:30 UT)

08 Oct 09 Oct 10 Oct Activity R0-R1 R0-R1 R0-R1 Fadeouts Possible Possible Possible 10.7cm/SSN 115/66 115/66 116/68 COMMENT: Solar flare activity on UT day 7-Oct was R0. There are currently four numbered sunspot regions on the solar disk. Active sunspot region (AR) 4549 (N10W12, beta-delta) has grown larger, however its polarities are simplifying. AR 4545 (N18W18, beta) has shown similar behaviour but is overall less complex. Other sunspots are either stable or in decay. Solar flare activity over 8-10 Oct is expected to be R0-R1. A weak partial halo CME was observed from 7/1500 UT deflected to the northwest, associated with a C-class flare from AR 4549. This CME may arrive at Earth on 11-Oct, although its impact is expected to negligible. S0 solar radiation storm conditions were observed on UT day 7-Oct. S0 solar radiation storm conditions are expected over 8-10 Oct. The solar wind environment on UT day 7-Oct was at background levels. The solar wind speed ranged between 415 to 350 km/s. The peak total interplanetary field strength (IMF, Bt) was 5 nT and the north-south IMF component range (Bz) was +2 to -5 nT. The solar wind environment is expected to become enhanced on 9-Oct due to the anticipated arrival of a CME that left the Sun on 6-Oct, whose effects are likely to continue into 10-Oct. A coronal hole may also contribute to enhanced conditions over 9-10 Oct.

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