A 22-yr variation of geomagnetic activity and interplanetary magnetic field

Details A 22-yr variation of geomagnetic activity and interplanetary magnetic field A 22-yr variation of geomagnetic activity and interplanetary magnetic field

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jatp...55..959c&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 55, no. 7, p. 959-965.

Physics

Geomagnetism, Interplanetary Magnetic Fields, Solar Activity, Solar Magnetic Field, Solar Terrestrial Interactions, Magnetoactivity, Solar Cycles

Scientific paper

In order to furnish a quantitative understanding of the relationship between the 22-year variation in geomagnetic activity and the 22-yr cycle of the solar magnetic field, the annual average of the IMF z-component is computed in solar equatorial coordinates from 1967 to 1988 and found not to correlate with geomagnetic activity. The IMF y-component is then computed in the same coordinates, while the z-component is recomputed in GSM coordinates. Both components are found to be correlated with the 22-year geomagnetic activity variation, perhaps due to the fact that the y-component has a 22-year variation in the equatorial plane.

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