Авроральные явления - 79 : результаты работ по программе Международного года исследований магнитосферы : материалы наблюдений Полярного геофизического института за 1979 г. : (оперативно-информационный материал) / Акад. наук СССР, Кол.фил. им. С. М. Кирова, Поляр. геофиз. ин-т ; [отв. ред. Б. Е. Брюнелли].

4 AURORA! PHENOMENA - 79 I M S - Observational data of Polar Geophysical Institute USSR Academy of Sciences Editor B.E.Brunelli Apatity, 1981 Mae volume contains the results of geophysical observations carried out at the stations of Polar Geophysical Institute at Kola Peninsula in 1979. The report continues the series started in 1970 /1-10/. Since 1977 the data are published in two volumes: "Auroral Phenomena", mainly with geomagnetic, auroral and balloon data and "Ionospheric Phenomena" /11-12/ with P-plots, riometer and radar observations data. The present report contains magnetоgrams, tables of hourly range (ig). tables of geomagnetic pulsations occurence, ascaplots, main auroral emission tables of time and counting rate of balloon flights. The magnetograms (H-component) are obtained, as a rule, from st.Loparskaya, in some cases they are replaced by that from st.Lovo- zero. In such cases a notice and special scale arrow are given. Pulsations (st.Lovo- zero) are selected according to Heacock's definition /13/, the description of tile procedure is given in the previous volume /9/. Ascaplots (st.Loparskaya) are present ed as usually, i.e. for each half-an-hour interval (+15 min. from the pointed value), aurora occurence in the northern, zenith and southern directions are given on Ithree upper lines. If the aurora intensity in the zenith direction is more than class 1, two lower lines are used. Cloudness (partial or complete) is marked by dote or vertical lines respectively. The time of the Moon appearance is marked by a horizont al line over the graph. The tables give 4278, 5577, 6300 and 6563 A emission intens ities (in 8 class scale) and the transparence values (A - for good transparency, В, С - for partial or complete cloudness). The geographical and corrected geomagnetic coordinates of the stations are given in Table 1. The universal time is used everywhere, the local time is notified, when used. Sometimes midnight and noon are also marked. The Sun passes Loparskaya geomagnetic meridian in equinox at 09.01 UT, in summer aolstice at 09.19 and 20.43, in winter solstice at 08.43 and 21.19 UT. The local midnight falls at 21.53 UT. The studied 1979 year is placed at the beginning of the Illth Solar Cycle. Smoothed sunspot numbers /15/ and mean values of hourly range r^ for Loparskaya are presented in Pig.1. The number of sunspots sharply increases both throughout the year and as compared with the previous one. Mean annual value decreased as compared with that in 1978 and reached its lowest value at the end of the year. Geophysical activity for each hour of the year, compiled from auroral data, geomagn etic and ionospheric disturbances are given at Calendar (Pig.2). One can see diurnal variation with decreasing of activity in the day-time (middle part of each row) as well as seasonal variation with higher activity during the first half of the year and their decreasing during the second half. Seasonal variation is given In j?ig.3. Geomagnetic activity is the highest in April, much higher than averaged for 10 years. On the contrary d.uring the summer montha and at the end of the year begining since September, the activity is lower than averaged for 10 years. The ionospheric activity is also the highest during the spring months. Intensity of the main auroral emissions during the second half of the year is also lower than in the first one, though it is not ao distinct as for geomagnetic and ionospheric disturbances.