Energy Coupling Between the Ionosphere and Inner Magnetosphere Related to Substorm Onset

摘要

The investigation of substorm effects in the inner magnetosphere with CRRES data looked in detail at over 50 substorms relative to signatures of onset and early expansion phases. The accomplishments of the project are: Determined perpendicular Poynting flux at CRRES in the inner magnetosphere at substorm onset, including primary direction is azimuthal, not radial, indicating a local source, no obvious signal from the magnetotail to trigger onset, strongly supports substorm onset location near the inner edge of the plasma sheet and process is local and a strong function of Magnetosphere-ionosphere (MI) coupling. We also developed near geosynchronous onset (NGO) model for substorm onset and expansion.