High-latitude day-time Pc1-2 continuous magnetic pulsations - A ground signature of the polar cusp and cleft projection

Details High-latitude day-time Pc1-2 continuous magnetic pulsations - A ground signature of the polar cusp and cleft projection High-latitude day-time Pc1-2 continuous magnetic pulsations - A ground signature of the polar cusp and cleft projection

Nov 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991p%26ss...39.1473m&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 39, Nov. 1991, p. 1473-1481, 1483-1491. Research supported by Australian Rese

Mathematics

Logic

12

Geomagnetic Micropulsations, Ground Truth, Polar Cusps, Power Spectra, Solar Cycles, Annual Variations, Diurnal Variations, Earth Magnetosphere, Polarization (Waves)

Scientific paper

New observational and dynamical morphological results of high-latitude Pc1-2 (0.2-10 s) magnetic pulsations observed at Davis, Antarctica during solar maximum are presented. An interesting regime of Pc1-2 containing structured, semistructured and unstructured, long duration magnetic pulsation bands, which appear to maximize in occurrence frequency and amplitude under the projection of the dayside polar cusp/cleft, is examined. An account of these emissions is given, including periods, amplitudes, duration, diurnal and seasonal distributions, polarization, power spectra, and their association with magnetic activity. Moreover, a review of the literature reveals the necessity for a universal convention to clear up the apparent paradox and confused nomenclature existing in the literature on high-altitude Pc1-2 magnetic pulsations. This study concludes that Pc1-2 magnetic pulsations as reported provide a ground diagnostic estimate as to whether a station lies under the projection of the polar cusp/cleft.

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