Coordinated Observation of Field Line Resonance in the Mid-magnetotail

Details Coordinated Observation of Field Line Resonance in the Mid-magnetotail Coordinated Observation of Field Line Resonance in the Mid-magnetotail

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsm44a..04z&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #SM44A-04

Physics

2748 Magnetotail Boundary Layers, 2752 Mhd Waves And Instabilities (2149, 6050, 7836), 2784 Solar Wind/Magnetosphere Interactions

Scientific paper

Standing Alfven waves of 1.1 mHz were observed by the Cluster satellites in the mid-Earth magnetotail (around ~ 21 Re equatorial distance, 0200 MLT) during 0600 - 0700 UT on August 8, 2003 while Cluster were situated in the central plasma sheet. Pulsations with the same frequency were also observed at several ground stations near Cluster's footpoint. The standing wave properties were determined from the electric and magnetic field measurements of Cluster. Data from the ground magnetometers indicated a latitudinal amplitude and phase structure consistent with the driven field line resonance (FLR) at 1.1 mHz. Simultaneously, quasi-periodic oscillations at different frequency were observed in the post-midnight/early morning sector by GOES 12 ( ~ 8.7 Re), Polar ( ~ 11 - 14 Re) and Geotail ( ~ 9.8 Re) as well. The August 8, 2003 event provides, for the first time, a coordinated in situ and ground-based observation of FLRs in the mid-magnetotail on stretched field lines.

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