Summary and Forecast

Solar Summary

(last updated 27 Feb 2019 23:30 UT)

Activity 27 Feb: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 27 Feb: 71/6

Solar Forecast

(last updated 27 Feb 2019 23:30 UT)

28 Feb 01 Mar 02 Mar Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 70/5 70/5 70/5 COMMENT: Solar activity was Very Low on UT day 27 February. The Sun, as seen from the Earthside, is currently spotless. Solar activity is expected to remain Very Low for the next 3 UT days, 28 February-02 March. Some minor impacts may be experienced today, 28 February due to the CME associated the filament observed around 23/2332UT. No other Earth directed CMEs were visible in the available coronagraph imagery. The solar wind parameters show the arrival of the anticipated corotating interaction region associated with a negative polarity coronal hole starting 27/0630UT. The Solar wind speed started increasing from 300 Km/s at 27/0630UT reaching 510 km/s at 27/1630UT, currently ~480 Km/s. During this period, the total IMF (Bt) increased from 4 nT reaching 12 nT at 27/1327UT and the north-south component of IMF (Bz) fluctuated between +/-10 nT with short lived southward excursions. The solar wind is expected to further enhance today, 28 February due coronal hole effects and possible minor impacts from 23/2330UT CME. Enhanced solar winds should continue on UT day 01 March hen begin to wane on UT day 02 March.

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