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. – 150 с.

only in the idea of a convection eleotrojet? In the following I shall show that there are aome observations giving hints for the gueaa that convection is not the unique cause of the eastward electrojet. AL and AU INDEX. Already a glance at the representations of AL and AU indices published in "Auroral electrojet magnetic activity indices AE (11)" for several years gives rise to certain doubts of unique convection-like nature of the eastward electrojet. In Pig.2, for various disturbances the corresponding AU and AL data are applied. On the left side of Pig. 2 such cases are compiled where a conforming development of AU and AL is existing. - 0 .9 1 * 16 . 5 .6 6 1 - 0 3 3 - 0 .5 9 mm -----— ------- 'У— Гкетё 9 — 3 1 1 .6 7 f 2 3 . 7 .6 7 - 0 .9 0 2 6 . 1 -6 8 ' „ Г 1 П Y J - 0 .9 7 2 2 -6 6 8 - 0 .3 1 ~ v' \ У ^ Л Г 2 8 . 2 . 6 8 - 0 .8 9 - С у — ' 2 . 7 .7 0 - 0 .6 6 2 8 . 4 .6 9 1 . - 0 .7 8 J v w ------- ^ — - 1 . 6 .7 0 2 3 S 7 0 - 0 .8 4 1 . 6.71 . - 0 .7 2 _____________ 0 ________ 1 5 .1 7 2 V - 0 .9 0 2 8 .1 7 1 . - 0 .6 3 w " 2 1 J . 7 J V Pig. 2. Selected examples of aubstorm events represented by AU- (upper curves) and AL- (lower curves) indices. The number in the upper right corner is the linear correlation coefficient between AU and AL. 59