Publication Date:
2011-08-24
Description:
The monthly and daily samples of the Ap index for the interval from 1932 through 1982 were studied using the power spectrum technique. Results obtained for Bartel's period (about 27 days), the semiannual period, the dual-peak solar cycle distribution of geomagnetic storms, and certain other medium-scale periodicities are examined in detail. In addition, results on the cumulative occurrence number of storms per decade as a function of the Ap and Dst indices for the storm are presented.
Keywords:
GEOPHYSICS
Type:
Journal of Geophysical Research (ISSN 0148-0227); 98; A6; p. 9215-9231.
Format:
text
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