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Variations of Interplanetary Parameters and Cosmic-Ray Intensities

Published online by Cambridge University Press:  14 August 2015

A. Geranios
A. Geranios*
Affiliation:
University of Athens, Nuclear Physics Laboratory Cosmic Ray Group Solonos str. 104, Athens 144 Greece

Abstract

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Observations of cosmic ray intensity depressions by earth bound neutron monitors and measurements of interplanetary parameter's variations aboard geocentric satellites in the period January 1972-July 1974 are analysed and grouped according to their correlation among them. From this analysis of about 30 cases it came out that the majority of the depressions correlates with the average propagation speed of interplanetary shocks as well as with the amplitude of the interplanetary magnetic field after the eruption of a solar flare. About one fourth of the events correlates with corotating fast solar wind streams. As the recovery time of the shock-related depressions depends strongly on the heliographic longitude of the causitive solar flare, it seems that the cosmic ray modulation region has a corotative-like feature.

Type
Part V. Coronal and Interplanetary Responses to Short Time Scale Phenomena: - Observations
Information
Symposium - International Astronomical Union , Volume 91: Solar and Interplanetary Dynamics , 1980 , pp. 393 - 398
Copyright
Copyright © Reidel 1980 

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