Авроральные явления - 80 : результаты работ по программе Международного года исследований магнитосферы : материалы наблюдений Полярного геофизического института за 1980 г. : (оперативно-информационный материал) / Акад. наук СССР, Кол. фил. им. С. М. Кирова, Поляр. геофиз. ин-т ; [отв. ред. Б. Е. Брюнелли].

4 AURORAL PHENOMENA - 80 ІМЗ-observational data of Polar Geophysical Institute USSR Academy of Sciences Editor B.E.Brunelli Apatity, 1984 The volume contains the results of geophysical observations carried out at the stations of Polar Geophysical Institute on Kola peninsula during 1980» The issue continues the series of publications started in 1970 /1-11/. Since 1977 the data are published in two series: "Auroral phenomena" containing geo magnetic, optical, and balloon data and "Ionospheric phenomena" /17-19/ presenting f-plots and riometric data. This issue includes magnetograms, tables of hourly range, r^, aacaplots and tables of spectral intensity inferred from the observations carried out at Loparskaya station. In some cases the magnetograms from Loparakaya are substitut ed by magnetograms from Lovozero and this із marked by an additional scale arrow. The asoaplots are given in their usual form, i.e. auroral appearance is marked for every half an hour interval in the northern, eenith or southern direotion. In case the intensity in the aenith exceeds•1 ball two lower lines are used. Partial or full cloudiness is marked by a dot or a vertical line, respectively, Spectral intensity was estimated in 8 ball system for emissions A. =427.8, 557.7 1 630 and 656.3 nm; conditions of observations are also marked (A stands for good transparence, whereas Вand Сdenote partial and full cloudiness, respectively). The geographical and corrected geomagnetic coordinates of at. loparskaya are: ф -(>80^5, , ft =33°05', Ф =64.08°, A =114.44°, respect ively. The universal time is used everywhere, the local midnight is marked in вот© events. The Sun pasaea the Loparskaya geomagnetic meridian at 9.01 UT in the equinox, it occurs at 9.19 and 20.43 UT in summer and at 8.43 and 20.19 UT in winter solstices, respectively. The local midnight falls at 21.53 UT. The studied year is near the beginning of the 2XEst Solar Cycle and is a year of high solar activity; the number of sunspots, as well as the value of the radioemission flux (denoted in Figure 1) either correspond or are near their maximum values. In contrast to solar activity magnetic activity in the auroral region is minimum as seen from monthly and annually averaged values of the geomagnetic hourly range, rH (Loparakaya observatory) given in Figure 1, This annually averaged value was maximum in 1974 near the minimum of solar activity (1975-1976) and it was minimum in the considered year of high solar activity. The variation of auroral activity for 11 years given in Figure 1 turned out to be almost opposite in its phase to the variation of solar activity. The numbers of sunspots, given in this figure, are greatly smoothed. The same figure contains monthly averaged values of the solar radioemission flux density. These values change significantly throughout the year, the most sharp changes occurred during the studied year. A sharp decrease of solar radioemission, in particular, took piece from November 1979 until May 1980.