Dynamics of the earth radiation belts during strong magnetic storms based on CORONAS-F data

Details Dynamics of the earth radiation belts during strong magnetic storms based on CORONAS-F data Dynamics of the earth radiation belts during strong magnetic storms based on CORONAS-F data

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sosyr..41..338k&link_type=abstract

Solar System Research, Volume 41, Issue 4, pp.338-347

Physics

5

94.30. Xy

Scientific paper

The results of an experimental study of the variations in the intensity of the fluxes of the Earth radiation belt (ERB) particles in 0.3 6 and 1 50 MeV energy intervals for electrons and protons, respectively, are reported. ERBs were studied during strong magnetic storms from August 2001 through November 2003. The results of the CORONAS-F mission obtained during the magnetic storms of November 6 (D st = -257 nT) and November 24, 2001 (D st = -221 nT), October 29 30 (D st = -400 nT) and November 20, 2003 (D st = -465 nT) are analyzed. The electron flux is found to decrease abruptly in the outer radiation belt during the main phase of the magnetic storms under consideration. During the recovery phase, the outer radiation belt is found to recover much closer to Earth, near the boundary of the penetration of solar electrons during the main phase of the magnetic storm. We associate the decrease in the electron flux with the abrupt decrease of the size of the magnetosphere during the main phase of the storm. Note that, in all cases studied, the Earth radiation belts exhibited rather long (several days) variations. In those cases where solar cosmic-ray fluxes were observed during the storm, protons with energies 1 5 MeV could be trapped to form an additional maximum of protons with such energies at L >2.

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