Magnetospheric substorm nucleus formation at the growth phase

Details Magnetospheric substorm nucleus formation at the growth phase Magnetospheric substorm nucleus formation at the growth phase

Apr 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ge%26ae..35...49v&link_type=abstract

Geomagnetism and Aeronomy , Vol. 35, p. 49-55

Physics

Growth Phase Of The Substorm, Localization Of The Center Of Substorm, The Current Wedge Of The Substorm

Scientific paper

The future nucleus of a magnetospheric substorm with a growth phase forms long before the moment T0 of an explosive release of energy. Photometric and magnetic data permit longitudinal localization of a forthcoming substorm nucleus tens of minutes ahead of the T0 moment. The substorm nucleus is thought to be formed by an inflow of ionospheric ions into the magnetosphere, formation of a local anisotropic pressure region at the magnetospheric equator, and a Birkeland current loop of the growth phase with field-aligned currents outflowing from the ionosphere on the east side of the loop, curvature currents at the equator, and currents inflowing into the ionosphere on the west side. Formed at the near-Earth flank of the loop at the equator is the X point that initiates reconnection of the magnetic field and the development of an opposite-direction current loop known as the substorm current wedge.

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