Solar Extreme Events of 2003:
Fundamental Science and Applied Aspects

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DYNAMICS OF THE EARTH'S RADIATION BELTS DURING OCTOBER - NOVEMBER, 2003
Kuznetsov S.N., Kudela K., Slivka M., Lazutin L.L., Murav'eva E.A., Myagkova I.N., Yushkov B.Yu.,

The dynamics of electron and proton radiation belts is studied using the CORONAS-F satellite data. The period October- November 2003 is characteristic by same very strong solar flares. One on October 28, with class X 17.2 (4B in optic) and other on November 4, was the strongest flare in last thirty years of class X28 ( 3B in optic). These and same others flares indicated magnetic storms. We analyze two of them - the first storm on October 29th (Dst=-401) and the second one on November 20th (Dst=-465) - using the measurement of relativistic electron fluxes with energy 0.6-1.5 MeV and 1.5-3.0 MeV on board of CORONAS-F satellite. The dynamics of outer radiation belt around the magnetic storm time was studied. In both events was observed, that in the storm time the maximum of the outer radiation belt shift to the lower L ( L<2) in comparison with their position before storm (L~4). For region with L>6 we observed increasing of electron fluxes about two orders in comparison with their values before the storm. The recovery phase of these fluxes is some days long. The global change of radiation belts is considered as well as variations associated with individual magnetic substorms. We compared these data with Dst variations, AE and Kp indices characterizing geomagnetic activity, with solar wind velocity and also with measurements of the others satellites during this time interval.





Skobeltsyn Institute of Nuclear Physics, Moscow State University, 2004