Physics of auroral phenomena : proceedings of the 37th Annual seminar, Apatity, 25 - 28 February, 2014 / [ed. board: A. G. Yahnin, N. V. Semenova]. - Апатиты : Изд-во Кольского научного центра РАН, 2014. - 125 с. : ил., табл.

Substorm intensificationfrom THEMIS satellite observations and IMF Bz com ponent changes energy ESA ion spectrum; 3 - the electric field components; and 4 - the Bz component. THEMIS-E _________ ^ _____ January 6.2008 80 0 3 70 ы c 1 - -------- ------------------- Г Т - .— I г------ ■ ■- ■ -J L i i i i £ 60 50 L ! ! ! ! J Y 8 г i j i i ■! pU. 4 i E ° f . _ . L L i i ^ ^ i 13 -4 UJ 2 2 JE ! 1 IS I f « 1 - i i i i ш 15 1 10 5 * 5 8 0 “ -5 i | 1200 800 F£ 400 i i i i : № friooo s i ^ 600 “ i i\ r ^ i i H i i i 1 ' i 1 1 ui 1+00 ssf 1^1000 600 V - ,M 100 i t so h i i “ Ui 40 g 0 Щ Г ” • i i i i i . .. I l l P ИIn Г1*P I 1 i • « r T= '* Г 1 1 11 I ' r i i i l l i i i i : 40 UI Щ 0 i f g l -40 47 -80 17: , . . . . . . . . . . . , . ._ ■1 bit 'II, J I 1 I , j 1 - tiIII i i i i i Jill J i>i ID i 1 illL il 1u! ii к JiL ьill in i i luuJ ill 1 h 1 idi iililiL I klllli Д У яЯ ш А лш чШ к Ь 'Ж Ё ы Ы Ш k lttfii л 111 Jl тТС"Ртгг ’ p i T 11 i ^ п Р П т * ' 4 j I I I * ' 1 * i i i 1 1 : , , ,2 1 1 3 ,4 ! 1 5 , 1 50 18:00 18:10 18:20 18:30 18:40 UT Figure 3. THEMIS-E data: total magnetic field, electric field components, components of the ESA (< 32 keV) ion energy density tensor. From this figure one can see that the transient, narrow undispersed 2-10 keV ion structure was observed during the large impulse of the radial component Ex at the moment labeled “A ” in Fig. 4 (this is the moment 3 in other figures of this report). This occurs during a sharp drop of the ion flux associated with the explosive stretching of the magnetic field observed by the THEMIS-E. One suppose that behind the outer boundary of the energetic ions in this time the satellite observed a local impulsive acceleration region. Then, outside the acceleration region, the more large- scale dispersed ion structures В and С were recorded at 18:26:30 UT and 18:29:30 UT simultaneously with increase of the local dipolarization observed at the THEMIS-E. Figure 4. EDIS event observed by THEMIS-E. Figure 5. Bottom panel: perturbation currents dJ at scale £*=10 s deduced by THEMIS-E magnetic data. Top panel- total magnetic field. Fig. 5 presents the perturbation currents dJ at scale <*=10i s calculated by THEMIS-E magnetic data under consideration. The procedure o f the perturbation currents i n n i ^°n Was dlscussed in [Kozelova and Kozelov, 2013]. Current vector d J (in arbitrary units) is presented January 6, 2008 THEMIS-E 24