Physics – Geophysics
Scientific paper
Feb 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986rvgeo..24...55o&link_type=abstract
Reviews of Geophysics (ISSN 8755-1209), vol. 24, Feb. 1986, p. 55-74. Research supported by Kenyatta University College.
Physics
Geophysics
66
Geomagnetic Micropulsations, International Magnetospheric Study, Magnetospheric Instability, Solar Terrestrial Interactions, Solar Wind, Interplanetary Magnetic Fields, Kelvin-Helmholtz Instability, Magnetohydrodynamic Waves, Shock Waves, Solar Wind Velocity
Scientific paper
The status of theoretical studies and experimental data on solar wind-controlled Pc 3, 4 pulsations is reviewed. Emphasis is given to recent observations covering the period during the International Magnetospheric Study (IMS). Data from early and recent observations suggest that the Pc 3, 4 pulsations are influenced by three main solar wind parameters, including solar wind velocity V(sw), the IMF orientation Theta (xB), and magnitude, B. The results are interpreted in terms of an external origin for Pc 3,4 pulsations which would imply that the pulsations originate in the upstream waves of the interplanetary medium and are transported by convection to the magnetopause, where they couple to oscillations of the magnetospheric field lines. The patterns of shock pulsations for different IMF orientations in the ecliptic plane are illustrated.
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