Connections between interplanetary magnetic field and geomagnetic pulsations

Details Connections between interplanetary magnetic field and geomagnetic pulsations Connections between interplanetary magnetic field and geomagnetic pulsations

Jul 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jatp...40..857v&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 40, July 1978, p. 857-865.

Physics

1

Geomagnetic Pulsations, Interplanetary Magnetic Fields, Diurnal Variations, Geomagnetism, Harmonic Analysis, Pulse Amplitude, Solar Wind

Scientific paper

Using 4924 hours of ground-based pulsation data, a study is made of the correlation between the interplanetary magnetic field (IMF) and geomagnetic pulsations. It is found that: (1) Pc 2-4 types follow the law 160/B, where B is the magnitude of the IMF, (2) when the IMF vector has a 30-degree angle with the sun-earth direction, amplitudes for Pc 3 are at a maximum, (3) when the IMF vector is perpendicular to the sun-earth direction, Pc 3-4 types are at a minimum, (4) longer period pulsations, such as Pc 5, are influenced by the IMF, and (5) pulsation amplitudes are generally a function of solar wind velocity or geomagnetic activity.

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