Shock-wave structure from short-period cosmic-ray variations

Details Shock-wave structure from short-period cosmic-ray variations Shock-wave structure from short-period cosmic-ray variations

May 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978izyak..42.1086k&link_type=abstract

(Vsesoiuznaia Konferentsiia po Kosmicheskim Lucham, Yakutsk, USSR, June 1977.) Akademiia Nauk SSSR, Izvestiia, Seriia Fizicheska

Computer Science

Cosmic Rays, Forbush Decreases, Shock Wave Propagation, Inhomogeneity, Interplanetary Magnetic Fields, Shock Fronts

Scientific paper

Results are reported for an analysis of experimental data on short-period cosmic-ray variations observed during 11 Forbush decreases. A comparison of computed and observed Forbush-decrease profiles shows that piston shock waves were responsible for the observed two-stage Forbush-decrease profiles and that shock-front structure must be taken into account when interpreting the profiles. The frequency spectrum of the short-period cosmic-ray variations is examined. It is concluded that the specific dynamics of these variations was caused by small-scale interplanetary-magnetic-field inhomogeneities ahead of the relevant shock fronts and decreased interplanetary-magnetic-field irregularity behind the fronts.

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