Solar cycle dependence of the regular daily variation in H at Alibag

Details Solar cycle dependence of the regular daily variation in H at Alibag Solar cycle dependence of the regular daily variation in H at Alibag

Jun 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978ang....34..119m&link_type=abstract

Annales de Geophysique, vol. 34, Apr.-June 1978, p. 119-123.

Physics

Diurnal Variations, Geomagnetism, Solar Cycles, Solar Terrestrial Interactions, Ring Currents, Secular Variations, Sunspots, Tropical Regions

Scientific paper

The element H at Alibag, India, has been calculated, after applying the necessary cyclic and noncyclic corrections, from the monthly mean hourly values on international quiet days for the periods 1934-1943 and 1944-1953. For each 10-yr period, second-degree polynomials were fitted between each of the 24 hourly series and the corresponding monthly mean sunspot number, and the field values and their rates of variation with the monthly mean sunspot number were calculated for various levels of solar activity. Daytime and nighttime variations of the field values are described. The data indicate a contribution from the asymmetric ring current. Day-to-day variability in the level of the geomagnetic field was taken into account in some calculations. A difference between rates of variation with respect to sunspot number for the two 10-yr periods is considered.

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