Morphology of 20-year variations of the geomagnetic field according to data from the worldwide network of observatories

Details Morphology of 20-year variations of the geomagnetic field according to data from the worldwide network of observatories Morphology of 20-year variations of the geomagnetic field according to data from the worldwide network of observatories

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988ge%26ae..28..286f&link_type=abstract

Geomagnetizm i Aeronomiia (ISSN 0016-7940), vol. 28, Mar.-Apr. 1988, p. 286-293. In Russian.

Computer Science

Geomagnetism, Long Term Effects, Magnetic Variations, Periodic Variations, Extremum Values, Harmonic Analysis, Time Series Analysis, Trend Analysis

Scientific paper

An analysis of time series of mean yearly geomagnetic field values is carried out on the basis of data from 54 magnetic observatories. The study involves a trend analysis and the identification of components with periods of 60, 20, and 11 years, with emphasis placed on the morphology of 20-year variations. Results indicate the existence of several extremum regions (foci) for the 20 year variations. A common source for 20 and 60 year variations is proposed.

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