Global characteristics of particle precipitation and field-aligned electron acceleration during isolated substorms

Details Global characteristics of particle precipitation and field-aligned electron acceleration during isolated substorms Global characteristics of particle precipitation and field-aligned electron acceleration during isolated substorms

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....98.1359s&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. A2, p. 1359-1375.

Physics

15

Electron Acceleration, Energetic Particles, Field Aligned Currents, Geomagnetic Pulsations, Magnetic Storms, Particle Precipitation, Dmsp Satellites, Geomagnetic Tail, Plasma Layers

Scientific paper

Energetic particle data from the DMSP F6 and F7 satellites are used to investigate global features of particle precipitation and field-aligned electron acceleration during isolated substorms. Both the AU and AL indices and low-altitude Pi 2 magnetic pulsations are employed to determine the onset time and the recovery phase of each isolated substorm. In the 1-hr interval before substorm onset, there is a clear boundary between the regions of the accelerated electron precipitation events (type 1 events) and of the cental plasma sheet (CPS) type unstructured electron precipitation events (type 2 events) for almost all local times. In the recovery phase of substorms, the poleward edge of the type 2 event region expands to latitudes higher than 72 deg around midnight. The magnetospheric source region of the type 2 events expands toward the magnetotail or toward the higher-latitude region after substorm onset.

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