Hydromagnetic wave observations in the vicinity of a magnetospheric plasma density gradient

Details Hydromagnetic wave observations in the vicinity of a magnetospheric plasma density gradient Hydromagnetic wave observations in the vicinity of a magnetospheric plasma density gradient

Apr 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.2447l&link_type=abstract

Journal of Geophysical Research, vol. 86, Apr. 1, 1981, p. 2447-2450.

Physics

11

Earth Magnetosphere, Magnetohydrodynamic Waves, Plasma Density, Space Plasmas, Density Distribution, Electron Density (Concentration), International Sun Earth Explorer 1, International Sun Earth Explorer 2, Magnetometers, Northern Hemisphere, Plasma Resonance, Power Spectra

Scientific paper

Data from magnetometer stations in the Northern Hemisphere are analyzed during a reported passage of the ISEE 1 and 2 spacecraft through the same local time sector as the ground-based stations. The ground-based data indicate that dominant hydromagnetic wave frequencies became higher with decreasing radial distance (decreasing latitude on the earth's surface), as was also indicated by the data recorded along the satellite track. Further, a wave resonance identified in the ground-based data occurred at a sharp density gradient in the magnetosphere plasma as reported from ISEE particle experiments. The theoretical conditions for existence of this resonance are consistent with the satellite measurements of significant fluxes of Z greater than 1 ions as contributors to the magnetosphere plasma population at this time.

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