Physics
Scientific paper
Jul 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....6.3419s&link_type=abstract
Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I
Physics
1
Scientific paper
Typical fittings of solar cosmic ray variations registered by the neutron monitor (NM) network do not consider real values of proton fluxes observed by satellites. However, a sharp knee of the proton spectrum may exist in the energy range of high latitude NM's during ground level enhancements (GLE) and storm particle events. This may lead to great misinterpretation of NM data, when the CR anisotropy and absolute intensity during GLE's and Forbush decreases are studied. In a case of GLE's the knee energy, but not the geomagnetic (or atmospheric) cutoff, would determine a count rate of particular NM, i.e. an impact of lower energy part of solar proton spectrum typically is overestimated. Contrary, during Forbush effects storm particles may contribute considerably to count rate of high and middle latitudes NM's. The solar proton events July 14, 2000 and November 4, 2001 illustrate the problem.
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