The relation between aurorae and coronal holes

Details The relation between aurorae and coronal holes The relation between aurorae and coronal holes

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990angeo...8..315b&link_type=abstract

Annales Geophysicae (ISSN 0992-7689), vol. 8, May 1990, p. 315-318.

Physics

2

Auroras, Coronal Holes, Solar Terrestrial Interactions, Sunspot Cycle, Geomagnetic Latitude, Interplanetary Medium, Polar Regions, Solar Wind, Tropical Regions

Scientific paper

In this paper, the relation between the evolution of polar and low latitude coronal holes area and the annual number of aurorae at invariant latitudes not greater than 62 deg during sunspot cycles 20 and 21 is analyzed. It was found that the number of aurorae is well and positively correlated with polar coronal holes size when they are large enough to reach solar latitudes below 60 deg, and negative when they are smaller. During the later period, the frequency of aurorae correlates well and positively with the evolution of low latitude holes which appear at the sun between + or - 60 deg.

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