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Date
April 7, 2015
Time
15:45
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Solar activity 07/04/2015

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INFO FROM SIDC - RWC BELGIUM 2015 Apr 07 12:30UTC

The Sun released one C3.0 flare during the past 24 hours. It was produced by NOAA AR 2320, peaked at 19:06 UT on April 6 and was associated to a dimming, an EUV wave, a surge, a CME and a Type II radio burst. The CME was first observed by LASCO C2 at 19:24 UT and had an angular extent of about 140 degrees. The plane-of-sky speed derived by CACTUS was 339 km/s, while the Type II burst corresponds to a speed of 691 km/s. This CME may deliver a glancing blow in the second half of April 9. In the next 24 hours, more C flaring is expected, with a slight chance for an M flare, especially from AR 2320 and 2318. Solar wind speed gradually decreased from about 480 to 400 km/s over the past 24 hours, while the Interplanetary Magnetic Field magnitude varied between 1 and 5 nT. Over the past 24 hours, geomagnetic conditions have been quiet (K Dourbes between 0 and 3; NOAA Kp between 1 and 2). There is a chance for active geomagnetic levels (K Dourbes = 4) late on April 7 and on April 8, due to a possible glancing blow of the CME of April 4. Quiet conditions with active intervals are possible in the second half of April 9, as a result of a glancing blow from the CME of April 6.






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