Dynamics of the Zones of Strong Earthquake Epicenters in the Arctic–Asian Seismic Belt

Abstract

Our comprehensive study of the Russian Arctic region aims to clarify the features and types of seismotectonic deformation of the crust in the Arctic–Asian Seismic Belt, specifically in the zones of strong earthquakes in the Laptev Sea Segment, the Kharaulakh Segment, and the Chersky Seismotectonic Zone. We have analyzed modern tectonic structures and active fault systems, as well as tectonic stress fields reconstructed by tectonophysical analysis of the Late Cenozoic faults and folds. The investigated neotectonic structures are ranked with respect to the regional classification principles. Changes in the crustal stress–strain state in the lithospheric plate boundaries between the Eurasian, North American, and Okhotsk Sea Plates are analyzed, and regularities of such changes are discovered. A set of models has been constructed for the studied segments of plate boundaries with account of the dynamics of the regional geological structures. The models can give a framework for the assessment of potential seismic risks of seismogenerating structures in the Russian Arctic region.

Estimation of Seismic Impacts Under Conditions of Permafrost Degradation

“…Значительна часть арктического региона России и Сибири, сложенная мерзлыми грунтами (Национальный..., 2004-2008), характеризуется повышенной сейсмичностью (Уломов, 2016). Сейсмичности и геодинамике Якутии и Арктического региона России посвящены работы (Козьмин, 1984;Козьмин и др., 2001;Кочетков, Козьмин, 1976;Петров и др., 2015;Imaeva et al, 2019;Imaev et al, 2015). Трудно предсказуемые изменения климата представляют реальную угрозу разветвленной инфраструктуре объектов топливно-энергетического комплекса (ТЭК), гидротехнических сооружений, крупных горных предприятий, линейных сооружений и городов, расположенных на мерзлоте (Анисимов и др., 2012, 2022).…”

New Perspectives in the Definition/Evaluation of Seismic Hazard through Analysis of the Environmental Effects Induced by Earthquakes

“…The paper "Dynamics of the Zones of Strong Earthquake Epicenters in the Arctic-Asian Seismic Belt" by L.P. Imaeva [18] presents a comprehensive study of the Russian Arctic region to clarify the features and types of seismotectonic deformation of the crust in the Arctic-Asian Seismic Belt, specifically in the zones of strong earthquakes in the Laptev Sea Segment, the Kharaulakh Segment, and the Chersky Seismotectonic Zone. The authors have analyzed modern tectonic structures and active fault systems, as well as tectonic stress fields reconstructed by tectonophysical analysis of the Late Cenozoic faults and folds.…”