On the course of the geomagnetic daily variation in low latitudes

Details On the course of the geomagnetic daily variation in low latitudes On the course of the geomagnetic daily variation in low latitudes

Oct 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jatp...39.1079o&link_type=abstract

(IUGG, IAGA, COSPAR, URSI, NOAA, USAF, Australian Academy of Science, and Australian Institute of Physics, International Symposi

Physics

4

Diurnal Variations, Dynamo Theory, Geomagnetism, Magnetic Variations, Atmospheric Physics, Harmonic Analysis, Solar Activity, Tropical Regions

Scientific paper

Published hourly values of the geomagnetic horizontal field (H) recorded at the Bangui magnetic observatory, Nigeria, in 1958, the year of highest known solar activity, are reanalyzed to give harmonic amplitudes instead of daily ranges. Nighttime contribution to S(H) tends to disappear under this new form of analysis. Since removal of Dst does not completely remove the effects of the disturbance in the ambient field at night, it is suggested that the usual geomagnetic mechanics of the atmospheric dynamo account for the daily variations.

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