Summary and Forecast

Solar Summary

(last updated 22 May 2013 23:57 UT)

Activity 22 May: High Flares Max Fadeout Freq. Sectors M5.0 1335UT possible lower European Observed 10.7 cm flux/Equivalent Sunspot Number for 22 May: 133/87

Solar Forecast

(last updated 22 May 2013 23:57 UT)

23 May 24 May 25 May Activity Low to moderate Low to moderate Low to moderate Fadeouts Possible Possible Possible 10.7cm/SSN 125/78 125/78 130/84 COMMENT: Solar activity was High during 22 May with an M5-flare observed at 1332 UT from solar region 1745 located towards the west limb. An impressive CME observed in association with this event is expected to have a glancing impact at Earth in the latter half of the UT day of 24 May. Energetic particles have also been observed in association with this event and the 10 MeV protons are presently above the S2-level. The 100 MeV protons are presently above 1pfu. Further M-class flare activity is possible of the next few days. Solar wind speeds declined slowly over the past 24 hours from approximately 500 km/s. Solar wind speeds are expected to increase during the latter half of the UT day of 24 May. ACE solar wind data presently appears to be contaminated due to the energetic particle event presently in progress.

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