Short-term cosmic ray increases and magnetic cloud-like structures during Forbush decreases

Details Short-term cosmic ray increases and magnetic cloud-like structures during Forbush decreases Short-term cosmic ray increases and magnetic cloud-like structures during Forbush decreases

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988stin...8915885i&link_type=abstract

Presented at the 11th European Cosmic Ray Symposium, Balatonfured, Hungary

Physics

Cosmic Rays, Earth Magnetosphere, Forbush Decreases, Interplanetary Space, Solar Wind, Increasing, Magnetic Fields, Rates (Per Time), Solar Activity

Scientific paper

Clear short-term cosmic ray increases with the time duration between 5 to 30 hours were identified by analyzing the nucleonic intensity recorded during Forbush decreases (amplitude greater than 1.5 percent at high-latitude stations), occurring in the period 1966-1979. The increases begin from 4 to 30 hr after the interplanetary shock arrival, and take place during the passage at the Earth of singular solar wind structures, characterized by cold material, intense magnetic-field strength and regular changes and regular changes in the B direction. The occurrences seem to be an indicator of the passage at the Earth of a magnetic cloud-like structure associated with flare ejecta material.

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