Physics of auroral phenomena : proceedings of the 38th annual seminar, Apatity, 2-6 march, 2015 / [ed. board: A. G. Yahnin, N. V. Semenova]. - Апатиты : Издательство Кольского научного центра РАН, 2015. - 189 с. : ил., табл.

1.1. Shagimuratov et al X component 2013-10-01 - 2013-10-03 L o n g i t u d e Day or month Figure 4. The variations of the geomagnetic field X-component at different stations and map of Scandinavian network R O T variations at station T R O M S O 2 0 1 3 /1 0 /0 1 - 2 0 1 3 /1 0 /0 2 fc 0 5 -3 о 0 3 - * - 0 .5 3 1 R O T variations at station K A L IN IN G R A D 2 0 1 3 /1 0 /0 1 - 2 0 1 3 /1 0 /0 2 12 15 18 21 24 12 15 18 21 24 L O V O Z E R O m agnetom eter 2 0 1 3 /1 0 /0 1 -2 0 1 3 /1 0 /0 2 H -com ponent ::.. г ~ ....— ■ Шv : :• -v | H' 0 -J*- — _________— -—I____ I ... I 10 5 0 SO D A N K Y LA m agnetom eter 2 0 1 3 /1 0 /0 1 -2 0 1 3 /1 0 /0 2 H -com ponent 6 S 12 15 18 21 24 ^ 9 *12~ 15 18 21 24 Time observation,(UT) Figure 5. The variotions of ROT at Tromso and Kaliningrad and keogram at the stations Lovozero and Sodaynkyla 3.2 Comparison of optical and TEC irregularity planetary pictures Based on the daily GPS measurements from 130-150 selected stations, the images of spatial distribution TEC fluctuations (index ROTI) in CGC and MLT coordinates was formed. These images demonstrate the irregularity oval, similarly to the auroral oval [9]. The occurrence of the irregularity oval relates with the auroral oval, cusp and polar cap. The irregularity oval expands mostly equatorward with an increase of the geomagnetic activity. In a case we study comparison of the auroral oval and oval of TEC irregularities at the TIXI station from 01.10.2013 to 03.10.2013. Position of the auroral oval was calculated by metods described in Starkov [10] and Sigemes [II] papers. As an example, Fig. 6 presents the dynamics of the irregularity oval in dependance on a geomagnetic activity. 109