Long-term correlation of EMIC wave activity and radiation belt flux variations

Wednesday, 7 March 2018: 10:50
Longshot and Bogey (Hotel Quinta da Marinha)
Maria Usanova, Laboratory for Atmospheric and Space Physics, Boulder, CO, United States, Alexander Drozdov, University of California Los Angeles, Los Angeles, CA, United States, Ian Robert Mann, Univ Alberta, Edmonton, AB, Canada and Yuri Shprits, GFZ German Research Center for Geosciences, Section 2.8: Magnetosphric Physics, Potsdam, Germany
PDF
Abstract:
Electromagnetic ion cyclotron (EMIC) waves are transverse electromagnetic waves generated in the equatorial magnetosphere that are believed to play an important role in the dynamics of the most energetic, ~ a few MeV radiation belt electron population. We expand on the study by Usanova et al. [2014] demonstrating a clear correlation between ground EMIC wave activity and modulation of ultra-relativistic electron pitch-angle distributions. We will present analysis of long-term (several months) simultaneous radiation belt flux measurements and electron pitch-angle distributions observed by the REPT instrument onboard the Van Allen Probes together with ground measurements of EMIC wave power by the CARISMA magnetometer array.
<< Previous Abstract | Next Abstract >>