Rising activity on Sunspot 1432 – Two moderate M-Class flares (March 14/15, 2012)


A moderate M2.8 Solar Flare peaked at 15:21 on March 14UTC, and was centered around Sunspot 1432 located towards the middle of the visible solar disk. Slow moving CME plasma cloud is seen in the latest STEREO Behind COR images and may be partially headed this way.

Another moderate M-class flare measuring M1.8 erupted at 07:52 on March 15, 2102, UTC.

Geophysical Alert Message
Issued: 2012 Mar 15 12:00 UTC
Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center

Geophysical Alert Message

Solar-terrestrial indices for 14 March follow.
Solar flux 119 and estimated planetary A-index 8.
The estimated planetary K-index at 1200 UTC on 15 March was 2.

Space weather for the past 24 hours has been moderate.
Solar radiation storms reaching the S2 level occurred.
Radio blackouts reaching the R1 level occurred.

Space weather for the next 24 hours is predicted to be minor.
Solar radiation storms reaching the S1 level are likely.
Radio blackouts reaching the R1 level are likely.


Summary of recent solar activity at 13:00 UTC, March, 15, 2012

Solar activity has been moderate with a pair of M-Class flares detected around Sunspot 1432. Active region 1429 is now located on the northwest limb and will soon be out of direct Earth view. New sunspot growth appears to be taking place to the west of Sunspot 1434 in the southern hemisphere. There will remain the chance for C-Class flares and perhaps another M-Class event on Thursday, March 15.


Space Weather Message Code: WARSUD
Serial Number: 109
Issue Time: 2012 Mar 15 12:50 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2012 Mar 15 1300 UTC
Valid To: 2012 Mar 15 1330 UTC
IP Shock Passage Observed: 2012 Mar 15 12:40 UTC


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