Авроральные явления - 71 : материалы наблюдений Полярного геофизического института 1971 г. : [сборник] / 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, 1975.

6 I'd 2,3 of September were rather quiet days (K is equal to 4 and 14 correspondingly). The interesting feature of the storm was the observations of proton fluxes (E above 10 MeV) during 312 hours in the interplanetary space according Explorer 41 data. The riometer at Loparskaya began to show effects of PCA from 01 30 Of 2nd of Septem ber. The PCA demonstrated the usual diurnal variation with the maximum intensity during the daily hours on 2nd of September (about 2.5 dB). The lower intensity PGA one can also see from 3 till of September. Inspite the proton flux was measured up to 1 2 ^ of September it is difficult find the PCA effects after 6 ^ o f September at records of Loparskaya riometer. The next world-wide storm considered began at 00 00 on 19th of November. The its peculiarity is the slow development both the initial.and the main phases. The storm continued up to 5 ^ of December. The interesting features of the ground appearance of the storm at Loparskaya were s the likeness of magnetograms on 22-25th of November, especially the likeness of development of negative disturbances) the sharp passage positive bays to negative ones on 25th of November and the appearance of the positive bay very early in the morning at 07 UT on 25t*1 of November. In the case the value of the absorption was less was about 6dB and its duration was less than 5 minutes. It is interesting to notice the sequence of the great morning S-bays of absorption with nearly equal amplitudes which one can observe duriiiti 22-26tri of November. SID and SCNA according to low latitude data did not appear at our region (15 25UT November 22| 05 46UT November 23j 11 40 November 28). The next interesting world-wide magnetic storm began at 19 04UT November 16. Th4s storm demonstrated the well developed both the initial and the main phases. The ampli tude of the main phase was as large as (at 21 00 November 17). The SC appearance one can seeu on magnetic records but SCA was absent. The second SC at 14 18 November 18 also was seen at magnetic records and was absent at absorption ones (SCA did not appear). The interesting feature of the storm was rather weak auroral disturbances during the well developed main phase. The auroral phenomena were nearly absent during 18-20 of December. Only from 21s^ of December moderate auroral disturbances began to develop at our region and already to 24 of December the disturbances ended. 24-28k*1 of December were practically quiet days.