FORECAST SOL: Normal green MAG: Normal green ION: Normal green
HomeSolarSolar ConditionsSummary and Forecast Monday, Apr 23 2018 11:36 UT
Solar Conditions

Summary and Forecast

Solar Summary

(last updated 22 Apr 2018 23:36 UT)

Activity 22 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 22 Apr: 76/14

Solar Forecast

(last updated 22 Apr 2018 23:36 UT)

23 Apr 24 Apr 25 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 75/13 75/13 75/13 COMMENT: Solar activity was at Very Low levels on UT day 22 April. Very Low levels of solar flare activity are expected for the next three UT days, 23-25 April, with a chance of C-class flares. No Earth-directed CMEs were observed in the available imagery during the last 24 hours. The solar wind speed declined from around 560 km/s to around 440 km/s on the UT day 22 April. The IMF Bt peaked at 5.95 nT at 22/1129UT then gradually declined, currently around 4 nT. The Bz component of IMF fluctuated between +/-4 nT. Solar winds are expected to continue to decline on 23 April, returning to nominal values on 24 April, as the influence of the coronal hole wanes. The solar wind is expected to become enhanced late on UT day 25 April due to the influence of a positive polarity, north polar coronal hole.

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

go to top of page