Solar
FORECAST SOL: Normal green MAG: Moderate yellow ION: Normal green
HomeSolarSolar ConditionsSummary and Forecast Tuesday, Feb 21 2017 12:38 UT
Solar Conditions

Summary and Forecast

Solar Summary

(last updated 20 Feb 2017 23:30 UT)

Activity 20 Feb: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 20 Feb: 81/22

Solar Forecast

(last updated 20 Feb 2017 23:30 UT)

21 Feb 22 Feb 23 Feb Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 81/22 81/22 81/22 COMMENT: Solar activity was at very low levels during the UT day 20 February, with a few B-class flares, mainly from region 2638 around N17E63. The previously reported filament eruption from near the centre of the visible solar disk from the earth around 19/0511 UT, does not seem to have produced any earthward directed CME. The solar wind speed showed a gradual decline from ~560 km/s to ~460 km/s during the UT day today as the coronal hole effect showed weakening during this period. The IMF Bt stayed close to 5 nT throughout the UT day, whereas IMF Bz varied mostly between +/-4 nT during this time. The currently in progress coronal hole effect is expected to further weaken through UT day 21 February. Another recurrent coronal hole is expected to start strengthening solar wind stream from 22 February for the following few days. Very low levels of solar activity may be expected for the next 3 days (21-23 February) with a slight chance of C-class flares.

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

go to top of page