2:15 PM - 2:30 PM
[PEM16-09] Initial results of EMIC observation by MGF/Arase
Li et al. [2011a, 2011b] showed that the whistler mode chorus waves, as a counter part of EMIC waves, were modulated by the compressional ULF waves and the variation of background density, and showed the global distribution of its modulation with three different mechanism, by compressional ULF waves, by density depletions, and by density enhancement. In order to find the global distribution of EMIC wave modulation and its mechanism, we investigated in situ statistical survey of EMIC waves observed by Arase satellite from March to October 2017, and identified 64 events using the fluxgate magnetometer (MGF) on the satellite. We found that the enhancements of EMIC waves were occurred at localized region less than 0.1MLT, and with 5-10nT weaker magnetic field than background, at 22:20-22:30UT on 27 May and at 2017, and at 07:30-08:00UT on 25 June 2017. We will discuss the EMIC wave excitation and enhancement mechanism in the deep inner magnetosphere.