The cosmic ray bursts of May 7 and September 23 and the Forbush decrease of February, 1978

Details The cosmic ray bursts of May 7 and September 23 and the Forbush decrease of February, 1978 The cosmic ray bursts of May 7 and September 23 and the Forbush decrease of February, 1978

Dec 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979izyer..43.2516f&link_type=abstract

(Vsesoiuznaia Konferentsiia po Kosmicheskim Lucham, Yerevan, Armenian SSR, June 1979.) Akademiia Nauk SSSR, Izvestiia, Seriia Fi

Physics

Forbush Decreases, Galactic Radiation, Solar Cosmic Rays, Solar Flares, Cosmic Rays, Relativistic Particles, Shock Waves, Solar Activity Effects

Scientific paper

The characteristics of the solar cosmic ray bursts of May 7 and September 23 and the Forbush decrease in galactic cosmic ray intensity of February, 1978 are examined, based on data obtained by a neutron-monitoring network, ground-based meson telescopes and the charged particle detectors on board the Raduga geostationary satellite. The cosmic ray burst of May is characterized by a sharp rise and decline in cosmic ray intensity, with an injection time of 03.20 UT at 72 deg W, while that of September is marked by a slow rise in charged particle intensities and strong neutron anisotropy, and is associated with a type IX solar X-ray flare. The decrease of cosmic ray intensity detected on February 15, 1978 is noted to be large and rapid, with a fast recovery as well. It is concluded that the increases in cosmic ray intensity were caused by the acceleration of relativistic particles in a solar flare, while the Forbush decrease was probably caused by a shock wave with a two-front structure.

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