HR: 0800h
AN: SM51B-1300    [Abstracts]
TI: On the Statistics of the Seasonal Geomagnetic Variations.
AU: * Panasenco, O
EM: olga@dec1.sinp.msu.ru
AF: Institute of Nuclear Physics Moscow State University, Institute of Nuclear Physics Moscow State University, Moscow, 119899 Russian Federation
AU: Veselovsky, I
EM: veselov@dec1.sinp.msu.ru
AF: Institute of Nuclear Physics Moscow State University, Institute of Nuclear Physics Moscow State University, Moscow, 119899 Russian Federation
AB: We analyze the data sets of daily average Dst (1957-2005) and Ap (1932-2005) indices. Differential and integral statistical distribution functions of geomagnetic perturbations versus their strength constructed. First moments of the distributions calculated. Asymptotic behavior of the distributions at extremely low and high magnetic activity as well as around mean and most probable states obtained for the whole data sets and for the selected periods of time (spring and autumn, summer and winter) around equinoxes and solstices. We confirm and extend the results of some previous studies. Absolute and relative amplitudes of seasonal geomagnetic variations interpreted as a consequence of the non-linear magnetospheric response to the solar and heliospheric drivers.
DE: 3225 Numerical approximations and analysis (4260)
DE: 7954 Magnetic storms (2788)
SC: SPA-Magnetospheric Physics [SM]
MN: Fall Meeting 2005