THEMIS Observations of Steady Magnetospheric Convection at the Dawn and Dusk Terminators

Details THEMIS Observations of Steady Magnetospheric Convection at the Dawn and Dusk Terminators THEMIS Observations of Steady Magnetospheric Convection at the Dawn and Dusk Terminators

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm23b1699k&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SM23B-1699

Other

2740 Magnetospheric Configuration And Dynamics, 2744 Magnetotail, 2790 Substorms

Scientific paper

Steady magnetospheric convection (SMC) events are a mode of magnetospheric response, consisting of enhanced, steady convection with no substorms and with duration longer than a typical substorm recovery phase. SMCs are one important mode whose study will aid in understanding the convecting magnetosphere's response to the solar wind. During this mode, large scale convection in the magnetosphere is stable, while on shorter time scales transient activations have been seen. We will utilize data from the THEMIS mission, a set of five spacecraft at varying distances around the Earth, to study flux return to the dayside. THEMIS ground magnetometers will eliminate substorm expansions from our dataset, and the All-Sky Imagers will provide dawn auroral observations. THEMIS experiences conjunctions at the dawn and dusk terminators during the months of November-December (dawn) and April-May (dusk). We use THEMIS observations to examine two SMC events, one at dawn on November 10, 2007 from 12:00-16:00 UT and another at dusk on May 22, 2008 from 0:00-7:30 UT. The behavior of the magnetic and electric fields and plasma flows in these regions will be described.

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