Reconstruction of a Flux Transfer Event Based on Observations From Five THEMIS Satellites

Physics

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2744 Magnetotail, 2764 Plasma Sheet

Scientific paper

We investigate a flux transfer event (FTE) observed by THEMIS near the duskside magnetopause using the reconstruction technique based on solving the Grad-Shafranov equation as developed previously by Sonnerup et al. [2006]. THEMIS D detected the FTE with the largest core magnetic field. THEMIS B and C observed deep troughs in magnetic field associated with the FTE. THEMIS A and E sensed only slightly altered magnetic field from their surroundings. Two-dimensional reconstruction maps of magnetic field and plasma pressure are generated by combining observations from all five THEMIS satellites. The resulting maps show asymmetry in these parameters between the magnetosheath and magnetospheric sides of the FTE. This asymmetry contributes partially to the different characteristics of the FTE seen by the five THEMIS satellites in addition to the different impact parameters of these satellites with respect to the FTE center. Sonnerup, B. U. Ö, et al. (2006), Grad-Shafranov reconstruction: An overview, J. Geophys. Res., 111, A09204, doi:10.1029/2006JA011717.

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