Электродинамические процессы в высоких широтах: материалы междунарордного симпозиума «Полярные геомагнитные явления», 25-31 мая 1986 г., Суздаль, СССР / Междунар. геодез. и геофиз. союз, Междунар. ассоц. геомагнетизма и аэрономии ; Акад. наук СССР, Кол. фил. им. С. М. Кирова, Поляр. геофиз. ин-т ; [редкол.: О. М. Распопов (отв. ред.). и др.]. - Апатиты : Кольский филиал АН СССР, 1988.

10 .12.83 630.0ПП1 427.8ППП 8.5 kr Figure 4b. Horth-south meridian scan profiles- of the r ed oxygen line (left panel) and the blue nitrogen band at 427.8 n m (right panel) in the midday aurora above Svalbard. Detailes from the overview plot i n Fig. 4a (from Sandholt et al.,1986b). ~ ~T I— I— I— t— r ~ 1— N 40 0 40 3 The Dece mber 10,198.3 c a a e . Figure 4a shows another example of simulta neous photometer observations of the midday aurora fr o m Svalbard and the m i d night aurora from Alaska. The north-south component.of the m agnetosheath m a g netic field, recor ded b y spacecraft ISBE-2 is shown i n the left paonel of the figure. ISEE-2 crossed the bow-ehock at 1009 ОТ, A m a j o r shift of the field vector occurred at 0735 UT. Du r i n g the following 1 1/2 h r magnetosheath В was rat her stables B x «=o, B y =20 and Ви=-30 nT. B e t w e e n appr.0750 and 0820 UT both the day- and nightside auroras m o v e d southward. Th e n at 0820 UT, a n e j o r substorm onset occurred on the nightside, wh i c h is clearly reflected in both the optical and geomagnetic recordings (right panel). The auroral breakup was followed b y a distinct poleward expansion. B e t w e e n 0820 and 0850 UT, 4 successive poleward m ovin g transient structures were observed above Svalbard. Details are shown in Figure 4b. I23