Simulated magnetopause losses and Van Allen Probe flux dropouts

MHD results show inward motion of the magnetopause for each event, along with enhanced ULF wave power affecting radial transport.

Test particle simulations of electron response on 8 October, prior to the strong flux enhancement on 9 October, provide evidence for loss due to magnetopause shadowing, both in energy and pitch angle dependence. Severe plasmapause erosion occurred during ~ 14 h of strongly southward interplanetary magnetic field Bz beginning 8 October coincident with the inner boundary of outer zone depletion.