Структура и динамика полярных токовых систем : материалы международного симпозиума «Полярные геомагнитные явления», 25-31 мая, Суздаль, СССР / Акад. наук СССР, Кол. фил. им. С. М. Кирова, Поляр. геофиз. ин-т. – Апатиты : [б. и.], 1988.

Pig. 9. Position of the electrojet center for different events. The eastward electrojet moves equutorwards always then when poleward of the eastward electro jet westward one appears. EASTWARD ELECTROJET AND RIOMETER ABSORPTION IN THE AFTERNOON SECTOR. Grafe et al. /1984/ showed that the riometer absorption during positive magn etic disturbances in the after noon sector is not always being observed. Fig.10 and 11 show from this publication examples of positive disturbances in the horizontal component of Sodan- kyla in the afternoon sector together with the CNA recordings for different structures of the Finnish riometer chain (Ranta, 1978). These two figures show distinctly two different types of positive bay disturbances. Those of Fig.10 are not accomp anied by increased riometer absorption. They belong to the convection-like type. On the other hand, the impulse-like variations in the examples of Fig.11, superimposed to a convection— like disturbance, are accompanied by distinct CNA disturbances. This ргосезз is obviously characterized by an increased particle precipitation. Hence, particle precipitation sometimes play an essen tial role in the intensification of the eastward electrojet, too. 24.01.1978 4 ^ KevOZl.i MHz CNA 2 0 2 0 2 - % IvaCo 27.6 MHz cna Шапку la 2?ЬMHZ CNA — -A -i .— ал $ Outи27.6 MHz С HA 300 -c sodotnkyla н IS If i003.1978 1 3 г 1 0 Keva 27.6 MHz CNA Д а Д — i - ч 4 « - - 1 “ Iv a L o 27.6 MHz CNA -i.-- « SoctankyCa 27.6 MHz CNA ------... -ЛЧ- i— i t 09 11 13 IS U7 19 UT Fig. 10. CNA of the Finnish riometer chain and the magnetic H-component of Sodankyla on 10 March 1978 and 24 January 1978. 65