SM53A-03
Prompt Recovery and Enhancement of the Earth's Outer Radiation Belt due to Relativistic Electron Injections
Friday, 18 December 2015: 14:07
2018 (Moscone West)
Chao Ling Tang1, Jichun Zhang2, Geoffrey D Reeves3, Daniel N. Baker4, Harlan E. Spence2, Herbert O Funsten5 and J. B. Blake6, (1)Shandong University at Weihai, Weihai, China, (2)University of New Hampshire Main Campus, Space Science Center, Durham, NH, United States, (3)Los Alamos National Laboratory, Los Alamos, NM, United States, (4)University of Colorado at Boulder, Boulder, CO, United States, (5)Los Alamos Natl Laboratory, Los Alamos, NM, United States, (6)The Aerospace Corporation, Los Angeles, CA, United States
Abstract:
We present multipoint observations (RBSP, GEOS and THEMIS) of the substorm electron injections during the substorm event on 16 August 2013. RBSP-A detected the MeV electron phase space density increased by an order of magnitude in about one hour at L* > 5.0. At L* = 4.4, the injected MeV electrons were also detected. It is suggested that the magnetic field dipolarization associated with the substorm injections alone can explain that the prompt recovery and enhancements of the relativistic electron (~ MeV) fluxes in the outer radiation belt. The observations of THEMIS-A also first presented that the near-Earth magnetotail at substorm onset is important in the MeV electron injection event: the enhanced fluxes of ~200 keV electrons are the source population and intense electromagnetic pulses are the driving source of MeV injected electrons. The pulse model is used to explain the dispersionless MeV injected electrons in the outer radiation belt observed by GEOS-13 and RBSP-A.
