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.

Energetic electron injections to the inner magnetosphere during magnetic storms and magnetospheric substorms 0 -200 -600 •1000 -1400 08 12 16 20 UT Fig. 4. H-component o f Tixie magnetogramm o f the April 3, 2004 auroral zone magnetic bays and Dst- index during April 3-4, 2004 magnetic storm. April 3-4, 2004 Magnetic Storm Measurements of the 0.3 MeV electrons on April 3, 2004 give us an example of two-step fast intensity increase both during active phases of two substorms. Magnetic storm started at 04 UT April 3 and reached Dst minimum -110 nT at 24 UT. During all the main phase substorm activity was recorded. Figure 4 presents Dst index and H-component of the Tixie magnetogramm. Figures 5 shows temporal 0.3 MeV electron flux variations on three latitude levels in the same manner as in a previous case study. First fast 0.3 MeV intensity increase at L=3.5 and 4 was registered before the end of the main phase during substorm activation on 17.40 UT. On Figure 4 first arrow indicates that it happens during strong magnetic bay. It is not easy to indicate exact time of the inward injection during the second increase which involved also L=3 level. It occurs between 2140 and 2256 UT. Intensity increase was registered this time also in 1.7 MeV channel at L=3 (not shown). S ’ (ft (ft ¥ z 0 в 12 16 0 6 12 1B UT Fig. 5. April 3, 2004 magnetic storm. The same as on Figure 2 . 10* 104 10' \ ------ r_ : L -4 .e 0 .3 M e V X SERVIS-1, 03-04.04, 2004 10* 10* 10 * 10* 10 * L-3.5, e 0.3 MeV x . x x » x * * 1-3, a 0.3 MeV *-**XXX i X x * # 4 * Fig. 6. Dst-index and H-component o f the Chakhurdakh magnetometer records during January 22, 2004 magnetic storm. January 22, 2004 Strong magnetic storm (-150 nT) was recorded on January 22, 2004. The main phase was very short, less than three hours and was accompanied by substorm activity. S e i- v is l 2 1 - 2 2 X 1 1 . 2 0 0 4 2 1 J 0 1 2 2 .0 1 Fig. 7. The same as on Figure 2 during January 22, 2004 magnetic storm. Ring current development and CHD magnetogramm are shown on Figure 6. 0.3 MeV electron intensity measured on L= 3, and 3.5 are presented by Figure 7. On L=4 and 5 adiabatic effects with magnetic field line stretching results in electron intensity decrease, therefore particle injection effect was recorded only at lower L-shells. Two steps of the electron intensity increase were registered on L=3.5. On Figure 6 three time marks are indicated: at 10.21 UT when normal electron flux (4 .104 (cm2.s.ster)-l was measured and two moments with increased flux half of minute later at 10.55 UT (2 105 (cm2.s.ster)-l) and at 12.07 UT (5 105 (cm2.s.ster)-l). Both intensity increases coincides remarkably with sharp magnetic bays. At L=3 there are sign of the first steplike increase, but later, after 12 UT to 20 UT electron intensity 19