Geodynamic Hazard Factors of Latvia: Experimental Data and Computational Analysis

Abstract

Geodynamic hazards of Latvia were identified by experimental and computational methods, including tectonophysical modeling in the MathLab environment. Among these factors are seismic shocks in Riga on November 22, 2010, abnormally high velocity of displacement of opposite sides of the Cirulisi fault, an increased anomaly of radon concentration on the profile crossing Olaine-Incukalns fault, deformations of buildings in the tectonic zone, formed by Olaine-Incukalns and Bergi faults. An analysis of the isostatic equilibrium of the Earth's crust at the Moho discontinuity level allowed to estimate Earth's crust development's and tendency type. On the basis of the analysis of experimental data and the results of tectonophysical modeling, a depression site was discovered in the area at the Plavinas dam. The conclusion is made about the expediency of geodynamic monitoring in areas of large agglomerations (Riga) and especially responsible objects (Plavinas dam, Incukalns underground gas storage).

Modern seismological surveys in Latvia from 2008 to 2019 and prospects for their development

“…С практической точки зрения, сейсмологические наблюдения важны для Латвии и ВБР, поскольку некоторые объекты энергетической (Плявиньская ГЭС, закрытая Игналинская АЭС) и транспортной инфраструктуры (проект "Rail Baltica"), некоторые крупные агломерации (Рига) расположены в районах с признаками геодинамической активности [Nikulins, 2019b]…”