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Date
April 9, 2015
Time
12:48
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Solar activity 09/04/2015

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INFO FROM SIDC - RWC BELGIUM 2015 Apr 09 12:32UTC

Beta-delta region NOAA AR 2320 released one M flare and one C flare during the past 24 hours. The M1.4 flare peaked at 14:43 UT on April 8 and was associated to a dimming. No corresponding CME was observed in LASCO
imagery. In the next 24 hours, M flaring is possible, with a slight chance for an X flare, especially from AR 2320. A small shock in the solar wind was observed by ACE around 1:10 UT on April 9. Solar wind speed jumped from about 340 to 370 km/s, while the Interplanetary Magnetic Field (IMF) magnitude jumped from about 4 to 6 nT and the solar wind density from 3 to 8 particles/cc. This is possibly related to the arrival of the partial halo CME of April 4. A second shock in the solar wind was observed by ACE around 9:12 UT. Solar wind speed
jumped from about 350 to 380 km/s, while the magnitude of the IMF jumped from about 6 to 10 nT. This is possibly related to a glancing blow from the CME of April 6. Over the past 24 hours, geomagnetic conditions have been quiet (K Dourbes between 1 and 3; NOAA Kp between 1 and 3). There is a chance for active to minor storm geomagnetic levels (K Dourbes = 4-5) on April 9 as a result of a glancing blow from the CME of April 6. Quiet to active geomagnetic activity is possible on April 10 and 11, as a new coronal hole high speed stream is expected to arrive near Earth.





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