Summary and Forecast

Solar Summary

(last updated 04 Mar 2021 23:30 UT)

Activity 04 Mar: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 04 Mar: 81/22

Solar Forecast

(last updated 04 Mar 2021 23:30 UT)

05 Mar 06 Mar 07 Mar Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 80/20 78/17 75/13 COMMENT: Solar activity was very low on UT day 4 March. There are two spotted regions on the visible disk AR2806 (S31W25 Bxo/beta) and AR2807 (S19E20 Cso/beta) both decaying. Solar activity is expected to be very low for the next three UT days 5-7 March. There was a CME observed in the Lasco images on UT day 03 March at 22UT, but a source could not be found on the visible disk and it is unlikely to be geoeffective. There were no other CMEs observed in the available coronagraph images. On 4 March, the solar wind speed decreased gradually from 597 km/s to 450 km/s due to waning Southern Polar coronal hole effects. The total IMF (Bt) peaked at 6 nT and the north-south component of the IMF (Bz) range was +/-4 nT. The solar wind speed is expected to be elevated again on UT day 5 March as a large equatorial coronal hole moves into geoeffective position.

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