Shallow-focus seismic activity in the rear of Japan-Sakhalin insular arc and its possible tectonic nature
© I.N. Tikhonov, V.L. Lomtev
On the base of analysis of data from different seismic bulletins for the Japan Sea basin the most comprehensive unified catalogue
of earthquake with magnitude M ≥ 3,0 and depths h ≤ 60 km for the period 1975-2010 has been prepared for the first time. Maps of epicenter
of events for the four intervals (0-10, 11-20, 21-30 and 31-60 km) and three sub-latitude sections are plotted. Structural peculiarities have
been considered and possible tectonic nature of seismic zone along submarine margin or borderland of the Japan-Sakhalin island arc: regional uplift,
rather mega-duplex fracture of compression faults, caused by crustal sliding at the rear of frontal deep thrust.
Key words: the Japan Sea, earthquakes catalogue, hypocenters distribution, Japan-Sakhalin arc, earth's crust tectonics, submarine margin, rear uplift.