Physics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsm51c0392t&link_type=abstract
American Geophysical Union, Fall Meeting 2004, abstract #SM51C-0392
Physics
7835 Magnetic Reconnection, 7871 Waves And Instabilities, 2724 Magnetopause, Cusp, And Boundary Layers, 2784 Solar Wind/Magnetosphere Interactions
Scientific paper
In a recent paper we reported the observational evidence for magnetic island structures at dawn and dusk side magnetopause based on the analysis of AMPTE/IRM plasma and magnetic field data and solving the Grad-Shafranov equation as a spatial initial value problem [Teh and Hau, EPS, 56, 681, 2004]. The dusk side event occurring on August 8, 1985 displays great similarities with the dawn side event of October 19, 1984 in that the reconstructed two-dimensional magnetic field maps involve a series of plasmoids with island width of about 500 km separated by the X lines. Both events are associated with multiple magnetopause crossings and occur when the in-and-out magnetopause motion finally subsides. We have recently found that one of the thirteen crossings prior to the reported dusk event also shows the unique feature of a series of pearl-like magnetic islands imbedded within the magnetopause current layer. The two successive crossings have nearly the same magneotopause normal and deHoffmann-Teller velocity and also with the same island width and aspect ratio.
Hau L.
Teh W.
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