Study of geomagnetic storms, solar flares, and centers of activity in 1977

Details Study of geomagnetic storms, solar flares, and centers of activity in 1977 Study of geomagnetic storms, solar flares, and centers of activity in 1977

Jan 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981stin...8132109h&link_type=abstract

Study of geomagnetic storms, solar flares, and centers of activity in 1977 AFGL

Astronomy and Astrophysics

Astronomy

Coronal Holes, Geomagnetism, Magnetic Storms, Radio Astronomy, Solar Activity, Emission Spectra, Solar Corona, Solar Cycles, Solar Radio Emission, Sun, X Ray Spectra

Scientific paper

Detailed comparison is made between various types of geomagnetic storms, solar flare activity and coronal holes for the year 1977. The Comprehensive Flare Index (CFI), which quantifies X-ray, optical and radio emission, again proves to be an increasing reliable predictor (statistically) of flare-associated geomagnetic storms as the value of the CFI increases. Two sequences of recurrent geomagnetic storms could be associated with coronal holes extending below 30 deg heliographic latitude. The two most active regions of the year resulted in "flare-sequential" storms in which a coronal hole (and related sequential storms) developed subsequent to the decay of flare production in an adjacent active region.

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