Computer Science
Scientific paper
Oct 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990chjss..10..280y&link_type=abstract
Chinese Journal of Space Science (ISSN 0254-6124), vol. 10, no. 4, Oct. 1990, p. 280-288. In Chinese.
Computer Science
Forbush Decreases, Magnetic Storms, Solar Cosmic Rays, Solar Flares, Solar Terrestrial Interactions, Geomagnetism, Mesons, Radiant Flux Density, Solar Radio Bursts
Scientific paper
The characteristics of Forbush decreases of cosmic ray caused by solar flares in March 1989 are analyzed. The anisotropy for the mu-meson component is analyzed, and the relationship between the cosmic ray intensity variation and the characteristics of solar flares and geomagnetic activity are discussed. The results show that Forbush decreases not only bear a relation to the importance, duration and angular distance from the central meridian of solar flares, but also depend on whether the optical flares are accompanied by strong X-ray bursts and radio bursts, as well as followed by sudden geomagnetic storms. The anisotropic analysis shows that the anisotropy of the large cosmic ray storm events in March was obviously weaker than of the cosmic ray intensity during the quiet days. It is probably because that strong solar activity could reduce the degree of the cosmic ray anisotropy.
Xiao Shao-Yu
Xue Shun-Sheng
Ye Zong-Hai
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