A comparative study of geomagnetic, interplanetary, and cosmic ray storms

Details A comparative study of geomagnetic, interplanetary, and cosmic ray storms A comparative study of geomagnetic, interplanetary, and cosmic ray storms

Feb 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82..561k&link_type=abstract

Journal of Geophysical Research, vol. 82, Feb. 1, 1977, p. 561-577.

Physics

12

Cosmic Rays, Interplanetary Magnetic Fields, Magnetic Storms, Solar Wind, Forbush Decreases, Neutron Counters, Particle Intensity, Plasma Density, Shock Wave Propagation

Scientific paper

Major geomagnetic storms (Dst change exceeding 60 gamma) and cosmic ray storms (changes exceeding 3% for the Alert neutron monitor) are compared for the period November 1965 through August 1973. The parameters of the two phenomena show virtually no intercorrelation. Interplanetary disturbances, characterized by enhanced number density and speed of solar wind and enhanced magnetic field, are responsible for both these phenomena. For cosmic ray storms, only an interplanetary magnetic blob seems in general to be necessary. However, the quantitative relationship between the total magnetic field and cosmic ray storm magnitudes is poor, and occasionally large blobs produce very small cosmic ray effects or vice versa, often not simultaneously.

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