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Detailed Reference Information |
Shiokawa, K., Yago, K., Yumoto, K., Baishev, D.G., Solovyev, S.I., Rich, F.J. and Mende, S.B. (2005). Ground and satellite observations of substorm onset arcs. Journal of Geophysical Research 110. doi: 10.1029/2005JA011281. issn: 0148-0227. |
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Auroral features and associated particles and fields are investigated for a sequence of substorm onsets observed at ~1900 MLT on 24 October 2000. During a 30-min interval at 1020--1050 UT, we identified three Pi 2 wave packets with positive H enhancements at midlatitudes and associated auroral brightenings in auroral images obtained by a ground all-sky camera and the IMAGE FUV imager. The DMSP F15 satellite crossed brightening arcs during the third Pi 2 pulsation in the field-of-view of the ground camera at Tixie (66.0¿ MLAT), Russia. The crossing was 1--2 hours duskside of the main onset local time. The brightening arcs were located in the region 1 upward field-aligned current system. The most equatorward arc, which brightened just after the second Pi 2 pulsation, was at the equatorward boundary of the region 1 current and in the sunward convection region. The arcs corresponded to inverted-V accelerated electrons with energies of ~10 keV. On the basis of these simultaneous ground-satellite measurements, we discuss substorm onset models of reconnection/flow braking and near-Earth plasma sheet instabilities. |
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Abstract |
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Keywords
Magnetospheric Physics, Substorms, Magnetospheric Physics, Auroral phenomena, Magnetospheric Physics, Energetic particles, precipitating, Magnetospheric Physics, Field-aligned currents and current systems, Magnetospheric Physics, Magnetospheric configuration and dynamics, auroral particles, field-aligned current, substorm onset |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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