1 Institut de Physique du Globe de Paris, Sorbonne Paris Cité, CNRS (UMR7154), 1 rue Jussieu, 75238 Paris, cedex 5, France. Institute of Volcanology and Seismology FEB RAS, 9 Piip Boulevard, Petropavlovsk-Kamchatsky, Russia. nshapiro@ipgp.fr koulakovIY@ipgg.sbras.ru.
2 Trof muk Institute of Petroleum Geology and Geophysics, SB RAS, Prospekt Koptyuga, 3, Novosibirsk, 630090, Russia. Novosibirsk State University, Pirogova, 2, Novosibirsk, 630090, Russia. nshapiro@ipgp.fr koulakovIY@ipgg.sbras.ru.