Distribution of amplitudes of geomagnetic variations and relationships to the K index

Details Distribution of amplitudes of geomagnetic variations and relationships to the K index Distribution of amplitudes of geomagnetic variations and relationships to the K index

Jul 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.5889k&link_type=abstract

Journal of Geophysical Research, vol. 86, July 1, 1981, p. 5889-5894.

Physics

1

Amplitude Distribution Analysis, Geomagnetism, Kp Index, Magnetic Disturbances, Power Spectra, Standard Deviation, Statistical Distributions

Scientific paper

The empirical cumulative distribution functions (ecdf's) of geomagnetic variations are investigated on the basis of measurements taken from three stations spaced in latitude from L about 3.2 to L about 4.0 over two separated intervals. The data are compared to existing theoretical data based on Gaussian distributions. The widths and amplitudes of the empirical distributions, their deviations from Gaussian, are analyzed and compared to the global and local geomagnetic K indices. Results show that in general the widths of the empirical distributions become broader with increasing geomagnetic activity and are narrower at lower latitudes for a given level of magnetic activity. The standard deviations and the 3-tile separations of the ecdf's show a good relationship to the K variations, indicative of geomagnetic variations.

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