SM21A-2459
Temporal and Spatial Characterization of ULF power and its relation to relativistic electrons in the radiation belts during geomagnetic storms
Tuesday, 15 December 2015
Poster Hall (Moscone South)
Pablo S Moya, NASA Goddard Space Flight Center, Heliophysics Division, Geospace Physics Laboratory, Mail Code 673, Greenbelt, MD, United States; Catholic University of America, Department of Physics, Washington, DC, United States, Victor A Pinto, University of California Los Angeles, Los Angeles, CA, United States, Adolfo F. Vinas, NASA Goddard Space Flight Center, Greenbelt, MD, United States, David G Sibeck, NASA/GSFC, Greenbelt, MD, United States, Shri Kanekal, University of Colorado at Boulder, LASP, Boulder, CO, United States and Craig Kletzing, University of Iowa, Iowa City, IA, United States
Abstract:
The response of the inner magnetosphere to different geomagnetic storm and solar wind conditions is still not fully understood. For example, electron fluxes in the outer radiation belt can be enhanced or depleted depending on the energy of the particles, and the phase or driver of the storm. In addition, the time scale of the process can vary from minutes to several days. Wave-particle interactions (such as stochastic diffusion or resonant acceleration) are believed to play an important role regulating the dynamics of the particles. However, despite decades of intense theoretical and observational studies, a definitive framework for the wave-particle interactions and the resulting effects in the magnetospheric dynamics remains an open problem. To progress towards a better understanding of the inner magnetosphere dynamics, we need a complete characterization of the electromagnetic fluctuations during storms. Here, using Van Allen Probe magnetic field and relativistic electron observations, we present an statistical study of the relationship between ULF wave power and relativistic electron fluxes in the outer radiation belt during several geomagnetic storms between 2012 and 2015, depending on local time, geocentric distance and storm phase.
