Авроральные явления - 72 : материалы наблюдений Полярного геофизического института за 1972 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, 1975 (обл. 1976).

AUROKAL PHENOMENA - 72 The Observational Data of the Polar Geophysical Institute Academy of Sciences of the USSR Editor B.E.Brunelli Apatity ~ 1976 The volume continues the PGI publications on observational data of geophysical processes over the Cola peninsula in 1972. The report is the forth in the series, the previous one contains the material of 1970 (1-2 parts) and 1971. i‘he data were prepared b y G.A.Loginov(geomagnetism), N.V.Shulgina(ionosphere activity), A.P.Osepyan(riometers), L.S.Evlashin and G.V.Starkov(auroras). The activity descrip tio n was done b y G.V.Starkov and B.E.Brunelli. The report contains the primary analysis of the following data : - the original records of geomagnetic H-component (Loparskaya or in some marked cases Lovosero) and hourl y range rH tables. - the graphs of riometer absorption (in dB.riometer 3 2 M H z ,Lopar skay a), - the askaplots based on the dat a of all-sky C-180 camera (Loparskaya), - the observational data of baloon flights (X rays and particles) carried out near Apatity. The universal time is used everywhere. Sometimes the local time scale or the time of m i d n i g h t ,sunrise and sunset are also given. The local midnight time for the Cola p enins ula is 22h UT, The askaplots are presented as usual s for each half an hour interval (.- 15min. fr o m the pointed value) aurora occurrence in the northern,zenith and southern direc tions are g iven (three upper lines).To denote aurora intensity in the zenith exceed ing class 1 two lower lines are used. Cloudness (partial or complete) is marked by dots or vertical line respectively. Besides the mentioned the moon illumination dat a are given: the time of appearance of the moon is marked b y horisontal line over the graph. In the tables of spectral lines Д = 4278> 5 5 7 7 i 6300 and 6789 Я emission inten sity is given in b class scale and also transparence values! A - good transparency, В - partial cloudness, С - complete cloudness. A common picture of aotivity distribution during the year is given at the саіеіь- dar (Fig.1). The activity level on three-ball system for every hour of the year is also given t h e r e . Act i v i t y characteristics are obtained f r o m the state of ionosphere ( 0 corresponds to f m in »fbE s ^ 3MHz,2 - to blackout condition,upper line),from geo magnetic fiel d ( activity 1 corresponds to 30 ^" < rH 100^-) and auroras ( 0 - no a u rora ,2 - brightness of aurora not less than class 2 or 3 kH),lower line. The inter vals when auroral or ionospheric observations were absent are excluded f r o m the graph. The days in the grap h are put in columns according to the S u n rotations Hi 1893 - 1906. The analysis of calendar (Fig.1) leads to the conclusion that the recurrent tendenc y exists at the beginning and at the end of the year. In the middle of the year the r e c ur renc y is interrupted but severe non-recurrent storms occur. The list of recurrent disturbances is given in a Table on page 6 . The last of the mentioned sequences (F and G) are short and so its recurrent tende ncy is not quite clear. The original recordings of phenomena and their copies used in the volume makes the impression that the typical development of activity over the Cola p eninsula changes in the following w a y » the appearance of the storm,more often going into recurrent s e q u e n c e ,given in Table increases abrup tly all forms of activity. Hi g h