Impulsive M3.9 solar flare off the eastern limb

Impulsive M3.9 solar flare off the eastern limb

Moderate impulsive solar flare registered as M3.9  erupted from area off the eastern limb, around one of new active regions and old Sunspot 1726, which already produced strong C 9.1 flare few hours earlier. The event started at 00:44 UTC and peaked at 00:57 UTC on May 10, 2013.

There are currently 8 numbered active regions on the visible side of the Sun. Sunspot 1734 is now located in the southwest quadrant and is crackling with C-class flares. Sunspots 1732, 1734 and 1736 are each rotating towards the southwest limb and will all be out of direct Earth view May 12, 2013. Meanwhile, three new regions rotated into view off the east limb and were numbered 1742, 1743 and 1744. Regions 1740 and 1741 continued to decay and are now spotless plages.



Solar wind
speed: 423.4 km/sec
density: 1.0 protons/cm3

The Radio Sun
10.7 cm flux: 127 sfu

Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 2 quiet

Interplanetary Mag. Field
Btotal3.8 nT
Bz1.8 nT south

Tags: m-class


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