Physics of auroral phenomena : proceedings of the 40th annual seminar, Apatity, 13-17 March, 2017 / [ed. board: N. V. Semenova, A. G. Yahnin]. - Апатиты : Издательство Кольского научного центра РАН, 2017. - 143 с. : ил., табл.

V.A. Pilipenko et al. UT Figure 2. GIC [A] recorded at stations VHD, RVD, LKH, and KND during magnetic storm Mar. 17, 2013, 05-24 UT. Near station's codes the geomagnetic latitudes are indicated. LT Figure 3. Vector diagram of ionospheric equivalent currents J along the meridional magnetometer profile in Fig. 1 for the period from 05 UT-to 24 UT, Mar. 17, 2013 (time step 2 min). Figure 4. Comparison between GIC amplitudes [A], Figure 5. Time variations o f the RB parameter derivatives |dX/dt| and |dY/dt| [nT/s], and geomagnetic estimated from geomagnetic variations (bottom panels) disturbances ДХ and AY [104 nT] at near-by stations at station IVA during the period 05 - 24 UT (time VKH and LOZ. cadence 15 min). Comparison of magnitude of magnetic disturbances X and Y with amplitudes of time derivatives |dX/dt|, |dY/dt| and magnitude o f derivative |dB/dt| (Fig. 4) shows that though the magnetic disturbance is much large in X-component than in Y-component, |X |» |Y |, but their derivatives |dX/dt[ and |dY/dt| are comparable. Therefore, small Y does not mean small dY/dt, and variations of both components provide a similar contribution into increase o f [dB/dt|. 36 40 30 < : 20 10 0 Я0П 200 я 20U \ 150 100 41 aoo 250 •3 son N ian 100 bl) 0 2b0 a son 3 150 \ 100 3 fin 0 400 200 0 с •200 400 200 0 -200 1500 1000 500 10.00 15.00 UT