Physics of auroral phenomena : proceedings of the 34th Annual seminar, Apatity, 01 - 04 March, 2011 / [ed.: A. G. Yahnin, A. A. Mochalov]. - Апатиты : Издательство Кольского научного центра РАН, 2011. - 231 с. : ил.

N.A. Barkhatov et al. field with the active zones of precipitation can be compared. For all studied 12 intervals of geomagnetic storms the correlation research for positions obtained and calculated boundaries is carry out. It turned out that satisfactory results (correlation coefficient greater than 0.7) for the southern border of the auroral oval (see Table 1) are observed only. A more precise definition of the northern (polar) auroral oval boundaries is difficult due to the fact that it is also the boundary of the active region of the polar cap. This area projection of open magnetic field lines from the magnetospheric tail rarefied plasma is present. Table 1. The results of correlation research of calculating boundaries in accordance with PGI RAS auroral oval and map the distribution maps of disturbances (skeletons). The upper value corresponds of the correlation to the northern borders; the lower value corresponds to the correlation of the southern border. Weak storms Stron ®storms Extreme storms Date North Date North Date North South South South 01.11.2000 0,06 23.05.2000 0,11 15.07.2000 0,12 0,68 0,66 0,81 18.06.2001 -0,04 18.04.2001 -0,01 24.11.2001 -0,04 0,7 0,72 0,74 19.05.2002 0,13 03.09.2002 0,02 07.09.2002 0,02 0,7 0,8 0,77 04.11.2003 -0,21 18.06.2003 0,11 20.11.2003 -0,04 0,75 0,65 0,79 Conclusion Postprocessing technique of space-time wavelet analysis of magnetic disturbances range Pc4-5 along the meridian chain stations accompanying geomagnetic storms for classification and prediction of expected or rising storms are used. Characteristic features of the computed dynamic spectra based on the study of storms of varying intensity are set and as a tool for classification of geomagnetic storms is used. Time interval analysis of the spectra of the meridional network of observatories to 3 days expanded, which makes it possible to obtain information about the intensity of geomagnetic activity on the dynamic spectrum of the magnetograms per day before the main phase of the storm and within two days after the storm beginning. With this approach, the division investigated perturbation at least three groups of intensity it was discovered. Numerical analysis of the skeletons to identify the boundaries of active high-latitude regions also helped. The results of post-processing of wavelet transforms considered magnetograms quantitatively with a map of active high-latitude zones according to the model of PGI RAS is compared. Show that the dynamics of the polar cap boundary and the auroral oval during magnetospheric disturbances by the characteristic features of disturbances in the distribution of skeletons in the expansion of different strength of geomagnetic storms can be detected. Acknowledgements. This work is executed at partial support under grant o f the RFBR 09-05-00495, and also program Ministry of Education and Science «Development of higher school scientific potential (2009-2011, project N 10266)». References 1. Pilipenko V., Fedorov E., Yagova N., Yumoto K. Hydromagnetic spectroscopy o f the magnetosphere with PC3 geomagnetic pulsations along the 210° meridian // Ann. Geophys., Vol. 17. No 1, p. 53-65, 1999. 2. Kozyreva O.V., Kleimenova N.G., Kornilova T.A., Kauriste K., Manninen J., Ranta A. Unusual spatial- temporal dynamics of geomagnetic disturbances during the main phase of the extremely strong magnetic storm of November 7-8, 2004 // Geomagnetism and Aeronomy, Vol. 46, No 5, p. 580-592, 2006. 3. Galperin Y.I., Feldsiein Y.I. Mapping of the Precipitation Region to the Plasma Sheet// J. Geomag. Geoelectr. 1996. 42