1. Institute of the Earth’s Crust, Siberian Branch of the Russian Academy of Sciences, ul. Lermontova 128, Irkutsk, 664033, Russia
2. Baikal Division of the Geophysical Survey, Russian Academy of Sciences, ul. Lermontova 128, Irkutsk, 664033, Russia
3. Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation, Russian Academy of Sciences, Kaluzhskoe Hwy 4, Moscow, Troitsk, 108840, Russia