Relation between magnetic activity and spread-F at Kodaikanal

Details Relation between magnetic activity and spread-F at Kodaikanal Relation between magnetic activity and spread-F at Kodaikanal

Dec 1967

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1967jatp...29.1669k&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 29, no. 12, pp. 1669-1672

Physics

Scientific paper

The correlation between night time values of spread-F indices, magnetic K-indices and h'maxF values for Kodaikanal are examined for a half solar cycle. Cross correlograms for spread-F indices and magnetic K-indices show that the variations of occurrence of spread-F echoes lag behind the variations of K-index by a period varying from zero in the sunspot maximum period to 5 days in the sunspot minimum period. A similar effect is observed between h'maxF variations and K-index variations but with lesser delay. A strong positive correlation is observed between spread-F indices and h'maxF values without any time lag throughout the half solar cycle.

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