A SEISMOTECTONIC MAP OF EASTERN SIBERIA

• Main Authors: Valery S. Imaev, Lyudmila P. Imaeva, Oleg P. Smekalin, Boris M. Koz’min, Nikolai N. Grib, Anatoly V. Chipizubov
• Format: Article
• Language: English
• Published: Institute of the Earth's crust, Siberian Branch of RAS 2015-10-01
• Series: Geodinamika i Tektonofizika
• Subjects: seismotectonic studies; seismic hazard; active faults; geological and geomorphological methods; trenching; seismic source zones; seismic belts and their segments; seismotectonic map of eastern siberia
• Online Access: https://www.gt-crust.ru/jour/article/view/179

The paper reviews goals and objectives, stages and the content of seismotectonic studies conducted in Eastern Siberia. Such studies are based on a comprehensive analysis of geological and geophysical data and provide for establishing whether the local earthquakes are of tectonic origin and revealing their relationships with recent geodynamic processes in the area under study. Seismic hazard assessment and evaluation of tectonic processes are the two major, closely interrelated aspects of seismotectonic studies. The latter are generally conducted in combination with seismic studies prior to the stage of detailed seismic zonation (DSZ) which is followed by seismic micro-zonation (SMZ). In three stages of seismotectonic studies, we analyse specific geological structures, reveal the regional dynamics of seismotectonic processes, clarify details of potential seismic hazard locations and identify sites of the potential instantaneous deformation of the crust which may take place due to active faulting. Based on results of the long-term studies conducted by the authors, a seismotectonic map of Eastern Siberia is compiled. The paper briefly reviews the methods of mapping and refers to data on active faults and neotectonic structures revealed in the area under study, which are closely related to regional earthquake sources.