Evolution of several space weather events connected with Forbush decreases

Details Evolution of several space weather events connected with Forbush decreases Evolution of several space weather events connected with Forbush decreases

Mar 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009iaus..257...57d&link_type=abstract

Universal Heliophysical Processes, Proceedings of the International Astronomical Union, IAU Symposium, Volume 257, p. 57-59

Astronomy and Astrophysics

Astronomy

Ism: Cosmic Rays, Sun: Flares, Solar-Terrestrial Relations, Earth

Scientific paper

In our recent paper (Dorotovič et al. 2008a) we focused on a study of the Forbush decrease (FD) of January 17-18 and 21-22, 2005. It was shown that the corresponding recovery time can depend on the density of high-energy protons in the CME matter. In this paper we identified several additional events in the period between 1995 and 2007. We found that the majority of FDs studied is accompanied by an abrupt count increase in the proton channel P1 and by a simultaneous decrease in the channel P7 (GOES). However, the analysis of temporal evolution of all FDs did not confirm the hypothesis on different recovery time after FD as a function of the energy distribution of the particles penetrating into radiation belts of the Earth.

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