Physics of auroral phenomena : proceedings of the 33rd Annual seminar, Apatity, 02 - 05 March, 2010 / [ed.: A.G. Yahnin, A. A. Mochalov]. - Апатиты : Издательство Кольского научного центра РАН, 2011. - 206 с. : ил.

Dayside storm-time ULFpulsation in the solar activity minimum 14-16 D E C 2006 Fig. 2. The variations in the velocity (V) and the density (N) of solar wind, Bz component of IMF, Dst- and AE- indices, and also ULF- of index for the auroral and polar zones in the forenoon and post-noon sectors the magnetic storm on December 14-16, 2006 (CME- storm). In the early recovery phase of this storm (interval 3) the Pc5 pulsations had the typical spatial distribution for CME-storms [Kozyreva and Kleimenova, 2008, 2009]. In the late recovery phase (interval 4) the Pc5 pulsations activity was shifted to the polar latitudes and was observed both in the pre-noon and afternoon sectors. 3. Discussion We carried out the detail comparison of the spatial- temporal distribution of the Pc5 pulsations during CIR- and CME-storms, considered in Fig. 1 and Fig. 2. The maps o f the pulsation amplitude global distribution on the Earth’s surface in the geomagnetic latitude-MLT coordinates were constructed. Figure 3 presents these maps for the different phases of two magnetic storms: the CIR-storm on May 09-14, 2006 (left panel) and the CME-storm on December 14-16, 2006 (right panel). It is seen that in the initial phase (interval 1) of the CIR-storm as well the CME-storm, the most intensive daytime wave activity was observed at the polar latitudes, but during the CIR-storm - at the latitudes of -74-78°, while during the CME-storm - on the lower latitudes (~ 72-76°). This difference is probably a result of the different dimension of the Earth magnetosphere during the discussed storms, caused by different values of the solar wind velocity (-370 km/s in the CIR-storm and -900 km/s in the CME- storm). The estimated the dayside magnetopause location was at L-8 in the initial phase of the CIR- storm and at L-7 in the initial phase of the CME- storm. In the main phase (interval 2), the region of the most intense Pc5 pulsations was different in the CIR- and CME-storms. It was located at the latitudes higher than 70° during the CIR-storm and lower than 70° during the CME-storm. The CIR associated ULF waves were observed in the large longitudinal sector (-06-17 MLT), however, the CME associated ULF waves - only in the local morning. CIR-STORM CME-STORM INITIAL PHASE Fig. 3. The global maps of the spatial distribution of ULF activity during the initial, main and recovery phases of the CIR- (May 09-14, 2006) and CME- (December 14-16, 2006) magnetic storms. The CME-storm recovery phase could be divided into an early and late stage, but in the CIR-storms sometimes it is not clear evident, as in the considered CIR-storm on May 09-14, 2006. In the early recovery phase of CME-storm (on December 15) Pc5 35