Geomagnetic line spectra - 2 to 70 years.

Details Geomagnetic line spectra - 2 to 70 years. Geomagnetic line spectra - 2 to 70 years.

Apr 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973ap%26ss..21..425c&link_type=abstract

Astrophysics and Space Science, Volume 21, Issue 2, pp.425-438

Astronomy and Astrophysics

Astrophysics

25

Scientific paper

Application of a new data adaptive approach to power spectrum estimation has yielded greatly improved knowledge of the geomagnetic spectrum in the range 2 to 70 yr. The first successful line spectrum detection of the solar and double solar cycle variations in absolute geomagnetic element data are presented; also detected are the first four harmonics of the solar cycle and, excepting one, the first nine harmonics of the double solar cycle. Finally, evidence is found for a ˜ 60 yr line. The implications of these results for a variety of problems in planetary and space physics are discussed.

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