A long-duration solar flare measuring M1.8 erupted from Active Region 1520 at 17:15 UTC on July 15, 2012. The event started at 12:50 UTC and ended at 18:30 UTC.
A very bright Coronal Mass Ejection (CME) was seen off the southwest limb on SOHO’s coronographs.
It appears the plasma cloud will be directed mostly towards the south and west.
As the Sunspot 1520 turns away from Earth, the chances for geoeffective eruptions are decreasing, so this could be one of the last strong solar flares from the region in this rotation.
speed: 491.0 km/sec
density: 0.8 protons/cm3
The Radio Sun
10.7 cm flux: 148 sfu
Now: Kp= 3 quiet
24-hr max: Kp= 4 unsettled
Interplanetary Mag. Field
Btotal: 4.1 nT
Bz: 1.0 nT north
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