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Types of interplanetary shocks and forbush decreases

✍ Scribed by Badruddin; D. Venkatesan; A. G. Ananth

Publisher
Springer
Year
1991
Tongue
English
Weight
314 KB
Volume
134
Category
Article
ISSN
0038-0938

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✦ Synopsis

Two types of interplanetary shocks have been identified and classified into two groups, those associated with a helium-enhancement and those not associated with any helium-enhancement. The cosmicray intensity decreases at Calgary neutron monitor are studied with respect to the arrival time of the two groups of shocks. The observations show that large Forbush decreases are caused by shocks associated with the helium-enhancement; and those not associated with He shocks show comparatively a small decrease in cosmic-ray intensity.

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