Distinctive characteristics of solar wind streams with regard to cosmic ray intensity and geomagnetic field variation

Details Distinctive characteristics of solar wind streams with regard to cosmic ray intensity and geomagnetic field variation Distinctive characteristics of solar wind streams with regard to cosmic ray intensity and geomagnetic field variation

Dec 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979ijrsp...8..230s&link_type=abstract

(National Physical Laboratory of India, Indian Space Research Organization, and Indian National Science Academy, Annual Radio an

Physics

Space Physics

6

Cosmic Rays, Magnetic Variations, Solar Flares, Solar Terrestrial Interactions, Solar Wind Velocity, Coronal Holes, Data Correlation, Geomagnetism, Particle Intensity, Solar Activity Effects

Scientific paper

Large solar wind streams observed recently have been classified into two groups, for the period 1968-1975, on the basis of their association with the solar flare, assuming that the velocity remains constant during sun-earth transit. Both the groups of streams are then separately related with the changes in the cosmic ray intensity and geomagnetic field. It is found that the streams associated with solar flare are very effective in producing cosmic ray intensity decreases as well as geomagnetic field variations; whereas the other group of streams which are not associated with any solar flare, produce only geomagnetic field variations and do not exhibit any cosmic ray intensity changes. The results are discussed in the light of recent observations of coronal holes and their association with the solar wind.

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