Interplanetary perturbations associated with type 4 solar flares

Details Interplanetary perturbations associated with type 4 solar flares Interplanetary perturbations associated with type 4 solar flares

May 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982stin...8413129i&link_type=abstract

Presented at 5th Intern. Symp. on Solar Terrestrial Phys., Ottawa, May 1982

Physics

Forbush Decreases, Interplanetary Magnetic Fields, Interplanetary Space, Solar Flares, Nucleonics, Shock Wave Propagation, Solar Wind Velocity

Scientific paper

Interplanetary perturbations associated with Forbush decreases from 1965 to 1974 are studied. The systematic appearance of the results confirms that type 4 solar flares are the origin of these perturbations. The perturbation front is a wide (100 deg in longitude) driven shock followed by a magnetic blob and high speed plasma cloud of 0.5 AU average radial dimension at the Earth orbit, emitted in a short time interval (10 hr average) immediately following the type 4 solar flare. The Forbush decrease amplitude is correlated with an empirical parameter which caters for the importance of the shock and magnetic blob at the perturbation front. In the interplanetary regions in which the galactic cosmic ray intensity is depressed, low energy cosmic ray fluxes are observed.

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