Physics
Scientific paper
Jul 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93.7386y&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 93, July 1, 1988, p. 7386-7397.
Physics
15
Conjugate Points, Geomagnetic Micropulsations, Polarization Characteristics, Tropical Regions, Diurnal Variations, Earth Ionosphere, Hemispheres, Interplanetary Magnetic Fields, Kelvin-Helmholtz Instability, Magnetohydrodynamics, Wave Propagation
Scientific paper
Conjugate magnetic observations were carried out at Asahikawa and Onagawa in Japan, and at Birdsville, Dalby, and St. Kilda in Australia during July 20-September 16, 1986 to study low-latitude Pc 3 magnetic pulsations. It is found that the polarizations at all stations switch statistically from left-handed in the morning to right-handed in the afternoon, where polarization senses are defined with reference to the direction of the main geomagnetic field. The data suggest that a standing field line resonance in the Pc 3 frequency range is situated at L greater than 2.1. At lower latitudes, Pc 3 magnetic pulsations could arise predominantly from compressional mode waves propagating transverse to the earth's magnetic field through the low-latitude ionosphere.
Lynn Kenneth J. W.
Menk Frederick W.
Saito Takesi
Tanaka Yasuhiro
Yumoto Kiyo
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