A conjugate area study of Pc 3 pulsations near cusp latitudes

Details A conjugate area study of Pc 3 pulsations near cusp latitudes A conjugate area study of Pc 3 pulsations near cusp latitudes

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9510695w&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, July 1, 1990, p. 10695-10698.

Physics

6

Geomagnetic Micropulsations, Interplanetary Magnetic Fields, Ion Cyclotron Radiation, Ionic Waves, Polar Cusps, Ampte (Satellites), Consecutive Events, Correlation Coefficients, Geomagnetic Pulsations, Power Spectra

Scientific paper

A study of Pc 3 pulsations observed in Canada and Antarctica reveals that the frequency of these events has a linear relationship with hourly averages of the IMF magnitude as measured by the IMP 8 spacecraft while in the upstream region. These events are narrow-banded and occur mostly in local morning and for IMF conditions with B(x) greater than zero, B(y) less than zero, and B(z) greater than zero. The frequency of the events is found to be independent of the IMF below the 29 mHz cutoff. It is concluded that upstream ion cyclotron waves are a source of these Pc 3 events above 29 mHz frequencies in both hemispheres.

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