10 spotted regions
Posted by JAC on 3/8/2011, 6:27 am
Region 11164 finally began to produce M flares. A major proton flare is possible before the region rotates over the northwest limb. Flares: M1.2/1F at 05:13, M1.4/1F at 08:05, M1.8 at 09:20, C4.9 at 10:21, long duration M3.7 event peaking at 20:12 (with an associated strong type II radio sweep and a very fast full halo CME) UTC. The latter event was a minor proton flare as well.

Region 11165 decayed slowly and was quiet. Observe that NOAA/SWPC has included S891 in this region.

Region 11166 began to develop again and has doubled its spot number in one day. A major flare is possible. Flares: long duration M1.9 event (associated with a partial halo CME) peaking at 14:30 UTC

Region 11167 decayed slowly and could soon become spotless.

Region 11169 developed slowly and could produce C flares.

Spotted regions not numbered by NOAA/SWPC:

[S891] This region emerged in the southwest quadrant on March 3 and developed slowly the first days. Rapid development was observed on March 6 with many new spots emerging and at least 2 magnetic delta structures forming. On March 7 most of the spots merged into two large penumbrae. The trailing penumbra is very complex with a strong magnetic delta structure. A major flare is possible. Location at midnight: S17W82. Flares: C3.0 at 02:12, C5.0 at 04:39, C3.6 at 07:18, M1.5 at 07:54, C5.1 at 16:09, C7.6 at 18:23, M1.5 at 21:50 UTC.

[S896] Spots emerged in the northeast quadrant, just north of region 11166, on March 6. No significant changes were observed on March 7. Location at midnight: N16E09.

[S897] This region emerged on March 7 in the southwest quadrant. Location at midnight: S26W53

[S898] A tiny spot emerged in the southeast quadrant on March 7. Location at midnight: S13E37

[S899] A new region emerged in the northern hemisphere near the central meridian on March 7. Location at midnight: N19W04

Early on March 8 region S891 produced an M1.3/1N flare at 02:29 while a spotless plage region near the southeast limb was the source of a long duration M1.5 event (which was associated with a CME off the east limb) peaking at 03:58 UTC.








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