TY  - JOUR
A1  - Drozdov, Alexander
A1  - Aseev, Nikita
A1  - Effenberger, Frederic
A1  - Turner, Drew L.
A1  - Saikin, Anthony
A1  - Shprits, Yuri Y.
T1  - Storm Time Depletions of Multi-MeV Radiation Belt Electrons Observed at Different Pitch Angles
T2  - Journal of geophysical research : Space physics
N2  - During geomagnetic storms, the rapid depletion of the high-energy (several MeV) outer radiation belt electrons is the result of loss to the interplanetary medium through the magnetopause, outward radial diffusion, and loss to the atmosphere due to wave-particle interactions. We have performed a statistical study of 110 storms using pitch angle resolved electron flux measurements from the Van Allen Probes mission and found that inside of the radiation belt (L* = 3 - 5) the number of storms that result in depletion of electrons with equatorial pitch angle alpha(eq) = 30 degrees is higher than number of storms that result in depletion of electrons with equatorial pitch angle alpha(eq) = 75 degrees. We conclude that this result is consistent with electron scattering by whistler and electromagnetic ion cyclotron waves. At the outer edge of the radiation belt (L* >= 5.2) the number of storms that result in depletion is also large (similar to 40-50%), emphasizing the significance of the magnetopause shadowing effect and outward radial transport.
Y1  - 2019
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/47894
SN  - 2169-9380
SN  - 2169-9402
VL  - 124
IS  - 11
SP  - 8943
EP  - 8953
PB  - American Geophysical Union
CY  - Washington
ER  -