Response of dayside magnetosphere and ionosphere to solar wind dynamic pressure pulse

Abstract:

We showed in-situ dayside magnetosphere plasma and field observation with THEMIS and GOES satellites after a sudden solar wind dynamic pressure impulse in detail. The flow evolution is consistent with the prediction of global MHD simulations. The flow vortex confirmed with multiple satellites (rotating clockwise)were inferred to be accompany with FAC that flow into the north (south) ionosphere in the north (south) hemisphere according to Bx and By variations. We think that the FAC is responsible for the ionospheric pre-noon TCV event found by the ground magnetism data.