Flux transfer events - Scale size and interior structure

Details Flux transfer events - Scale size and interior structure Flux transfer events - Scale size and interior structure

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984georl..11..131s&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 11, Feb. 1984, p. 131-134. Research supported by the Bundesministerium für F

Physics

168

Earth Magnetosphere, Magnetic Flux, Magnetopause, Space Plasmas, Field Aligned Currents, International Sun Earth Explorer 1, International Sun Earth Explorer 2, Magnetohydrodynamic Waves, Magnetometers, Magnetosheath, Plasma Density

Scientific paper

The first direct investigation of the spatial properties of flux transfer events (FTEs) at the earth's dayside magnetopause are reported. Simultaneous magnetometer and plasma data from the ISEE 1 and 2 satellites are combined to show that magnetosheath FTEs can have a scale size of the order of an earth radius in the magnetopause normal direction. It is confirmed that the magnetic field within the events appears to be twisted, this twisting corresponding to a core field-aligned current of a magnitude of a few tens of thousands of A. Also shown is evidence for plasma vorticity in FTEs. The transverse flow and field perturbations accompanying the three events studied obey approximately the Walen relation for a propagating Alfven wave.

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