A new index of the recurrence of high geomagnetic activity and its connection with the solar cycle

Details A new index of the recurrence of high geomagnetic activity and its connection with the solar cycle A new index of the recurrence of high geomagnetic activity and its connection with the solar cycle

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ge%26ae..30..669b&link_type=abstract

Geomagnetizm i Aeronomiia (ISSN 0016-7940), vol. 30, July-Aug. 1990, p. 669-671. In Russian.

Physics

1

Geomagnetism, Solar Cycles, Solar Terrestrial Interactions, Solar Wind, Recursive Functions, Secular Variations, Solar Magnetic Field, Twenty-Seven Day Variation

Scientific paper

A new index of the 27-day recurrence of large geomagnetic disturbances over the past 100 years are proposed and calculated. Time variations of this index are correlated with the latitudinal distribution of solar magnetic fields and prominences during cycles 20 and 21. It is suggested that the recurrence of high geomagnetic activity at the solar-activity decline phase is associated with solar-wind streams issuing from a specific solar global magnetic field configuration of the preceding 11-year cycle.

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