Localized reconnection and substorm onset on Dec. 22, 1996

Details Localized reconnection and substorm onset on Dec. 22, 1996 Localized reconnection and substorm onset on Dec. 22, 1996

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.3545a&link_type=abstract

Geophysical Research Letters, Volume 26, Issue 23, p. 3545-3548

Physics

22

Magnetospheric Physics: Magnetospheric Configuration And Dynamics, Magnetospheric Physics: Magnetotail, Magnetospheric Physics: Plasma Sheet, Magnetospheric Physics: Storms And Substorms

Scientific paper

This study uses observations from the Wind, Geotail and Interball spacecraft together with global MHD simulation to investigate the onset of a substorm on Dec. 22, 1996. At 1240 UT, during the growth phase, a small localized neutral line formed in the dawn sector at x~-10RE and initially extended less than 3RE in azimuth. The formation of this neutral line was associated with the total Poynting flux being focused in the region close to the neutral line. During the growth phase the neutral line expanded in azimuth and moved tailward. At the onset of the expansion phase lobe field lines began to reconnect, and a second small, localized neutral line formed in the dusk magnetotail at ~1256 UT. Lobe reconnection at this neutral line corresponded to a second intensification of the substorm at ~1316 UT.

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