Interball Observations of Multiple Flux Transfer Events

Details Interball Observations of Multiple Flux Transfer Events Interball Observations of Multiple Flux Transfer Events

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsm51a1385k&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SM51A-1385

Physics

2706 Cusp, 2724 Magnetopause And Boundary Layers, 2728 Magnetosheath

Scientific paper

We present results from a statistical study of 806 flux transfer events (FTEs) observed by the Interball-1 spacecraft from 1995 to 1999, with an emphasis on the characteristics of multiple FTEs. Sequences of 10 or more FTEs were observed on 21 days. A total of 319 multiple FTEs were observed, with reccurrence rates ranging from 1 to 20 min. The events occur primarily within the magnetosheath and exhibit the direct bipolar (+, -) magnetic field signatures in the magnetic field component normal to the nominal magnetopause that would be epected at the spacecraft's equatorial, high-latitude, and flank locations. Multiple events exhibit amplitudes that range from 3 to 20 nT, but their average amplitude is less than that for the distribution of all FTEs. Using Wind, IMP-8, and Geotail as monitors, we sought to determine conditions favoring the occurrence of multiple FTEs. Like isolated FTEs, multiple FTEs show a marked tendency to occur for southward IMF orientations. Many multiple FTEs corresponded to ~10 per cent variations in solar wind dynamic pressure. We examine these results in the light of results from recent simulations.

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