Geomagnetic activity and Hale sector boundaries

Details Geomagnetic activity and Hale sector boundaries Geomagnetic activity and Hale sector boundaries

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981p%26ss...29..167l&link_type=abstract

Planetary and Space Science, vol. 29, Feb. 1981, p. 167-170. Research supported by the Max C. Fleischmann Foundation

Computer Science

6

Geomagnetism, Interplanetary Magnetic Fields, Solar Activity Effects, Solar Terrestrial Interactions, Earth Magnetosphere, Geocentric Coordinates, Solar Atmosphere, Solar Cycles, Solar Wind Velocity

Scientific paper

The variation of the geomagnetic activity index Ap at the IMF sector boundaries (+ to - and - to +) has been studied for three solar cycles, separating data into vernal and autumnal equinoxes. It was found that a reported increase in Ap as an effect of a Hale boundary can be better attributed to the occurrence of a negative IMF Bz component in the geocentric solar magnetospheric coordinate system and to the occurrence of high speed solar wind streams.

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