Abstract

The article analyzes the macroseismic impact of earthquakes that occurred in the late 20th and early 21st centuries on the Russian Platform and in the Urals. The relationships between seismic intensity I, magnitude M, and hypocentral distance r, according to the Blake–Shebalin equation, were established for five regions of the study area. For the first time, the coefficients of individual macroseismic field equations for the Ural near-surface and deeper sources were obtained (h ≤ 1 km: b = 1.5, v = 2.43, c = 1.01; h > 1 km: b = 1.5, v = 2.9, c = 2.13). The possibility of using the Blake–Shebalin equation with average coefficients (b = 1.5, v = 3.5, c = 3) was confirmed for earthquakes in southern Russian Platform. The low attenuation of the intensity of Baltic Sea earthquakes is established for the Eastern Baltics. The coefficient v = 2.48 in the obtained equation is similar to v = 2.7 recommended for this territory in the new Russian and Interstate Standard “Earthquakes: Macroseismic Intensity Scale” (2019). However, the level of seismic impact according to the established equation is higher than that predicted by this standard. The reduced attenuation coefficients for earthquakes in the eastern Russian Platform and induced events (h ≤ 1 km) in the eastern Baltic Shield have been obtained: v = 2.3 and v = 3.02, respectively. However, due to the lack of field data, these results need to be refined. New dependences are recommended for more accurate prediction of seismic impact from earthquakes in these regions.

中文翻译：

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俄罗斯平台地震影响的衰减特征和乌拉尔地震

摘要

本文分析了20世纪末和21世纪初在俄罗斯平台和乌拉尔发生的地震对宏观地震的影响。根据研究区域的五个区域，根据Blake-Shebalin方程建立了地震烈度I，震级M和震中距离r的关系。首次，获得个别强震场方程为乌拉尔近表面和更深的源的系数（ħ ≤1公里：b = 1.5，v = 2.43，c ^ = 1.01; ħ >1公里：b  = 1.5，v = 2.9，c= 2.13）。俄罗斯南部平台地震证实了使用具有平均系数（b  = 1.5，v = 3.5，c = 3）的Blake-Shebalin方程的可能性。对于东部波罗的海，波罗的海地震的衰减程度较低。所得方程中的系数v = 2.48类似于新的俄罗斯联邦和州际标准“地震：宏观地震强度标度”（2019年）中对该区域建议的v = 2.7。但是，根据已建立的方程式，地震影响的水平高于该标准所预测的水平。俄罗斯东部平台地震和诱发事件的衰减系数降低（ħ ≤1公里）在东部巴尔盾已经获得：v = 2.3和v = 3.02，分别。但是，由于缺少现场数据，因此需要完善这些结果。建议使用新的依存关系，以更准确地预测这些地区的地震对地震的影响。