A. A. Dobrynina
Institute of the Earth’s Crust, Siberian Branch of the Russian Academy of Sciences; Geological Institute, Siberian Branch of the Russian Academy of Sciences
Russian Federation

128 Lermontov St, Irkutsk 664033;

6 Sakhyanova St, Ulan-Ude 670047, Republic of Buryatia

N. P. Perevalova
Institute of Solar-Terrestrial Physics, Siberian Branch of the Russian Academy of Sciences
Russian Federation

126а Lermontov St, Irkutsk 664033

V. A. Sankov
Institute of the Earth’s Crust, Siberian Branch of the Russian Academy of Sciences; Irkutsk State University
Russian Federation

128 Lermontov St, Irkutsk 664033;

1 Karl Marx St, Irkutsk 664003

I. K. Edemsky
Institute of Solar-Terrestrial Physics, Siberian Branch of the Russian Academy of Sciences
Russian Federation

126а Lermontov St, Irkutsk 664033

A. V. Lukhnev
Institute of the Earth’s Crust, Siberian Branch of the Russian Academy of Sciences
Russian Federation

128 Lermontov St, Irkutsk 664033