Summary and Forecast

Solar Summary

(last updated 05 Apr 2026 23:30 UT)

Activity 05 Apr: R0 Flares Max Fadeout Freq. Sectors M1.0 04/2304UT possible lower West Pacific Observed 10.7 cm flux/Equivalent Sunspot Number for 05 Apr: 118/70

Solar Forecast

(last updated 05 Apr 2026 23:30 UT)

06 Apr 07 Apr 08 Apr Activity R1, chance of R2 R1, chance of R2 R1, chance of R2 Fadeouts Possible Possible Possible 10.7cm/SSN 118/70 115/66 113/64 COMMENT: Solar flare activity was at the R0 level on UT day 05-Apr, with no M-class or greater flares observed. There are currently six sunspot regions on the visible disk, with Active Region (AR) 4409 (N05W25, beta-gamma) being the most magnetically complex. This region has shown some spot redistribution over the last 24 hours, and has remained largely stable. Newly numbered AR 4412 appeared on the solar disk at N10E11, and currently exhibits an alpha magnetic classification. All other regions are either stable or in decay. Solar flare activity is expected to be at the R1 level, with a chance of R2, over the period 06-08 Apr, due to ongoing flare activity from AR 4409. S0 solar proton conditions were observed throughout 05-Apr, with the solar proton flux continuing to slowly decline toward background values. S0 solar proton conditions are expected over 06-08 Apr. No Earth directed coronal mass ejections (CMEs) were observed in coronagraph imagery over the last 24 hours. The solar wind speed remained strong on 05-Apr, while slowly declining across the UT day. The solar wind speed began the day ranging between 570-590 km/s, and by the end of the UT day was ranging between 520-540 km/s. The interplanetary magnetic field strength (IMF, Bt) remained mostly constant across the UT day, peaking at 6 nT, with the north-south component (Bz) ranging between -5 and +5 nT. The solar wind speed is expected to continue to decline towards background levels over 06-08 Apr.

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