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The first X-class flare of solar cycle 24

X2.2 flare occurred at 0144 UT on February 15, 2011 in active region 1158. This flare is the first X-class flare of cycle 24. A full halo CME with speed of approximately 710 km/s was observed associated with this flare. A weak enhancement of solar energetic particles from this event was detected by the GOES satellite.




X2.2 flare observed by SDO/AIA (NASA)




X-ray flux observation by GOES (NOAA)




A full hallo CME observed by SOHO/LASCO(ESA&NASA)




Solar energetic particle observed by GOES (NOAA)



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