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Detailed Reference Information |
Greenstadt, E.W., Coroniti, F.V., Moses, S.L., Tsurutani, B.T., Omidi, N., Quest, K.B. and Krauss-Varban, D. (1991). Weak, quasiparallel profiles of Earth's bow shock: A comparison between numerical simulations and ISEE 3 observations on the far flank. Geophysical Research Letters 18: doi: 10.1029/91GL02246. issn: 0094-8276. |
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Over 200 crossings of the distant downwind flanks of Earth's magnetosonic bow shock by ISEE 3 included many cases of weak, or low Mach number, quasiparallel shocks. A consistent feature of the magnetic field profiles was the presence of large amplitude, near periodic to irregular transverse oscillations downstream from even the weakest Q∥ shocks. Large downstream perturbations with whistler-like features similar to those of the observations appear in one-dimensional simulations when MA>2.5 but not when MA=2.1. The observed cases with downstream waves also occurred when MA>≈2.5, suggesting the importance of the Alfv¿n as opposed to magnetosonic Mach number in determining the signature of weak Q∥ shocks. ¿American Geophysical Union 1991 |
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Abstract |
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Keywords
Magnetospheric Physics, Solar wind-magnetosphere interactions, Magnetospheric Physics, MHD waves and instabilities, Magnetospheric Physics, Storms and substorms |
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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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