Авроральные явления - 75 : материалы наблюдений Полярного геофизического института за 1975 г. / Акад. наук СССР, Кол. фил. им. С. М. Кирова, Поляр. геофиз. ин-т ; [редкол.: Б. Е. Брюнелли (отв. ред.) и др.]. - Апатиты : Кольский филиал АН СССР, 1978.

6 series. Aj and A sequences of Rot 1940 are marked as inoreasings or activity at 11. VI and 15.VI. With B-sequence is connected weak but clearly separate disturbance ( 2 1 .VI), with C-sequence - ratner strong disturbance (29.VI ). C-aequence in this case is coincides with - to + of II® transition. Iimadiateily after separate disturbance at b.VII (SC-magnetic s t o r m ) ,which may Ъэ cornected w i t h D-sequence, begins period of increased activity, which include SC-storr; (9.VII) and may be connected with Aj-sequence of Rot 1 9 4 1 . The two ne:.t inoreasings of activity (13.VII and 17-VIi) are connected with A and В-sequences. Hather inter a SC-storm (,25. Vd-0 із connected wi t n 0-sequenoe. Hear the time of i)-sequence SC-i,torm (31* VII) arises. Disturbances corresponding to all sequences агіье on Rot 1 9 4 2 . Aj-sequence is marked by gradual: increase of activity (5.VIII), A-paquence connects to aC- storin (u.VIIl). At Jjopax'SKaya the i c r e a s i n g of activity in form of smooth sloping negative bay begins before aSC (at 0 3 .15 №1' at Й.ѴІИ). В-sequence is marked by азет; of disturoed days started ас 14.ѴІИ. C-sequence gives a set or disturbances beginning at 20.V11J., not so intense as on previous rotations, but still more incense as c c "pared witn otner sequences, тпе i n c r e s m g or activity at 29.V111 may be attr^Do&ed to y-sequence. With A^-sequence or itoi; 194-i is connected аывт: of weak disturbances (1-2.IX ), A - 3 equence gives r is e more intense disturbance with SC-storm at 6. 0 . (uSC at 10.45 UT). More intense active period beginning at 9*12 .is connected with B -sequence, with C-seque.ice the sl'.ort and moderate on intensity period beginning at 15-IX is connected. D~sequenee is marked by rather strong disturbance (26.XX ). It is seen that disturbances connected with negative IMK sector now are less intense. On Rot /\<¥'ч- the sequence Aj is not developed. With A-sequence SO-magnetic storm (with 3;iC at 06.1b and 11.15 UT at 3*x) is connected} at Loparsicaya the disturbance develops as a long negative bay. aright active period arises at a time of В-sequence ( 6 .X). At the end of this period C-sequence gives relatively moderate increasing of activity chough including SC-storm (SBC at O d .17 UT at 14.X). Tie existence of ulsturbances connected wi t n D-sequence (20.X and 22.X) is doubtful. On not 1945 Aj-sequence is absent, A-sequence connected w i t h tie transition from long n e g a t - /e to long positive 1 ® sector gives a series or disturbances with sharp commencement ( 2 ь .X ) . in middle part of positive sector rather strong disturbance arises in connection wi t h B-sequence ( 2.XI )* C-sequence is marked as a short but clearly developed active period beginning at 9.XI . Clear separate disturbance which is rot accompanied by the change of iMF-sign arises at a time of resequence (17.XI) . On Hot 1 -6 the increasing of activity begins at a time of Aj-sequence and coincides w i t h - to + of IMF transition. SC-magnetic storm (S3C at UT at 21.XI) arises simultaneously with + to - of 11/® transition. The reverse transition (- to main +, A-sequence) is accompanied by a new disturbance 24.Xi). High active period connected w i t h B-sequence starts at 29«Xi. As at previous rotations the activity increases inside positive sector and is not accompanied by IMF changes. The next moderate disturbance arises at time of C- sequence (.b.Xil;. Disturbance of the D-serias is a weak and arises inside very long negative sector, on Rot 1947 we a k disturbances arise at; time of Aj and A-sequencea (.Ib.xil and 2 1 .X 1 1 J. xne last disturbance ox tne year c25»Xii j is connected wi t h B~ sequence. So the detailed study of the activity development during 1975 leads to the conclusion that all or almost all observed during this year disturbances are connected with one of five reccurent sequences which in their turn are connected wi t h the sign of the IMF,