Characterization of Alfvenic fluctuations in the magnetopause boundary layer

Details Characterization of Alfvenic fluctuations in the magnetopause boundary layer Characterization of Alfvenic fluctuations in the magnetopause boundary layer

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....94..101r&link_type=abstract

(Chapman Conference on Plasma Waves and Instabilities in Magnetospheres and at Comets, Sendai, Japan, Oct. 12-16, 1987) Journal

Physics

44

Magnetohydrodynamic Waves, Magnetopause, Planetary Boundary Layer, Analysis Of Variance, Geos 2 Satellite, Magnetic Signatures, Spectral Correlation, Time Response

Scientific paper

In the course of its magnetopause crossings at various local times, ESA's GEOS 2 spacecraft has detected intense magnetic and electric fluctuations in the 1-10 Hz ULF range. Spectral analysis and correlations are applied to both these fluctuations, as well as a minimum-variance analysis to the magnetic fluctuations, in order to ascertain the nature of these fluctuations. It is shown that the observed electric and magnetic signatures are consistent with small-scale Alfvenic field-aligned structures passing by the spacecraft at high speed. These structures are suggested to correspond to nonlinear Alfvenic structures.

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