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A substorm-associated enhancement in the XUV radiation measuring channel observed by ESP/EVE/SDO

         

摘要

Comparing the ESP/EVE/SDO flux data of 2011 Feb 6,with the counterparts of XRS/GOES and SEM/SOHO,we find that there is an enhancement that is not apparent in the two latter datasets.The enhancement,possibly regarded as a flare at first glimpse,nevertheless,does not involve an energy-release from the Sun.Based on the enhancement,we combine data from SXI/GOES 15 into a synthesized analysis,and concluded that it arises from a particle-associated enhancement in the channel that measures XUV radiation.Paradoxically,it seems to be somewhat of a particle-avalanching process.Prior to the event,a moderate geomagnetic storm took place.Subsequently,while the event is proceeding,a geomagnetic substorm is simultaneously observed.Therefore,the particles,though unidentified,are probably energetic electrons induced by substorm injection.

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