Summary and Forecast

Solar Summary

(last updated 10 Apr 2026 23:30 UT)

Activity 10 Apr: R0 Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 10 Apr: 94/40

Solar Forecast

(last updated 10 Apr 2026 23:30 UT)

11 Apr 12 Apr 13 Apr Activity R0 R0 R0 Fadeouts None expected None expected None expected 10.7cm/SSN 92/37 90/34 90/34 COMMENT: Solar flare activity was at the R0 level on UT day 10-Apr. No significant flare activity was observed. There is currently no region of significance on the visible solar disk. A small solar region AR4416 (N19E17, beta) emerged on disk and rapidly grew, though this initial rapid growth rate may not be sustained. Small solar region AR4414 (N13E41, beta) is decaying. There are currently three numbered solar regions on the visible solar disk. The other solar region is a stable monopole. Solar activity is expected to be at the R0 level for 11-13 Apr. S0 solar radiation storm conditions were observed on 10-Apr. S0 solar radiation storm conditions are expected over 11-13 Apr. No Earth directed coronal mass ejections (CMEs) were observed. A very minor faint narrow westward CME was observed from 10/0449UT that could not be correlated to the solar disk. Three isolated coronal holes are now located west of the solar central meridian and the Earth entered a coronal hole wind stream from 10/0305UT. The solar wind speed gradually increased from light to strong on 10-Apr, ranging from 373 to 662 km/s and is currently at 599 km/s. The peak total interplanetary magnetic field strength (IMF, Bt) was 11 nT and the north-south component (Bz) range was -9 and +11 nT. An interval of mildly southward IMF conditions was observed 10/1100-1300UT. The solar wind speed is expected to be strong on 11-12 Apr due to the influence of the solar coronal hole wind stream.

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