THEMIS observations of tail reconnection around the times of substorm onset

Details THEMIS observations of tail reconnection around the times of substorm onset THEMIS observations of tail reconnection around the times of substorm onset

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsm24a..06a&link_type=abstract

American Geophysical Union, Spring Meeting 2008, abstract #SM24A-06

Physics

2723 Magnetic Reconnection (7526, 7835), 2744 Magnetotail, 2764 Plasma Sheet, 2790 Substorms

Scientific paper

Case studies from the five THEMIS probes during planned tail alignments are presented around times of substorm onset. The probes systematically moved from the southern plasma sheet boundary layer near post- noon to the northern plasma sheet near pre-noon, and observed dozens of substorm onsets from unprecedented probe alignments along the Sun-Earth line. Plasma sheet reconnection is evident at 20-30RE at the outer probes only very close to the neutral sheet, due to the extreme localization of that process, even when the probes reside within the thin plasma sheet. It appears to start close to the neutral sheet, often inside of 20RE, and well within closed plasma sheet field lines; it evolves tailward within minutes as it engulfs outer layers of the plasma sheet.

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