Summary and Forecast

Solar Summary

(last updated 18 Aug 2017 23:50 UT)

Activity 18 Aug: Low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 18 Aug: 80/20

Solar Forecast

(last updated 18 Aug 2017 23:50 UT)

19 Aug 20 Aug 21 Aug Activity Very low to low Very low to low Very low to low Fadeouts None expected None expected None expected 10.7cm/SSN 82/23 84/26 85/27 COMMENT: Solar activity was Low over the last 24 hours. There were two notable C-class flares observed with a C4.4 event at 2002UT that appears to have originated from the west limb and a C2.9 event from region 2671 (N12E22). Region 2671 remains the only active region on the visible disk. No Earth-directed CMEs were observed in the available LASCO imagery during the last 24 hours. Solar wind speed remains elevated due to the influence of a recurrent coronal hole high speed solar wind stream and ranged between 525km/s and 661km/s over the UT day. The north-south component of IMF, Bz fluctuated between -7nT and +6nT with some minor sustained southward periods throughout the UT day. Solar wind speeds are expected to remain elevated for the next 2-3 days. Very Low to Low solar activity is expected over the next three days with further C-class events possible and slight chance of M-class activity on 19Aug-20Aug.

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