Migration of Displacement Anomalies on the Flanks of a Preparing Earthquake Source: A Swing Model

IF 0.9 4区 地球科学 Q4 GEOCHEMISTRY & GEOPHYSICS
V. G. Bondur, I. A. Garagash, M. B. Gokhberg, D. A. Alekseev
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引用次数: 0

Abstract—The geomechanical modeling of the stress-strain dynamics before the 2019 M = 7.1 Ridgecrest earthquake, Southern California, revealed an alternating pattern of maximum displacement anomalies that develop around the ends of the future rupture, simulating the process of “swinging” in the epicentral zone of the earthquake. These results, together with the existing theoretical concepts of crustal block structure with block interaction, are used to build a “swing” geomechanical model based on the stick-slip phenomenon in a three-block configuration. The parameters of the model are related to the rheological properties of the Earth’s crust in the area of destruction of the bridging isthmus (a patch), which determines the source size of the seismic event.

Abstract Image

预备震源侧翼位移异常的偏移:一个摆动模型
2019年南加州M = 7.1 Ridgecrest地震前应力-应变动力学的地质力学建模显示,在未来破裂的末端周围出现了最大位移异常的交替模式,模拟了地震震中带的“摆动”过程。结合已有的具有块体相互作用的地壳块体结构理论概念,建立了基于三块体结构中粘滑现象的“摇摆”地质力学模型。模型的参数与桥式地峡破坏区域(一块)的地壳流变特性有关,这决定了地震事件的震源大小。
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来源期刊
Izvestiya, Physics of the Solid Earth
Izvestiya, Physics of the Solid Earth 地学-地球化学与地球物理
CiteScore
1.60
自引率
30.00%
发文量
60
审稿时长
6-12 weeks
期刊介绍: Izvestiya, Physics of the Solid Earth is an international peer reviewed journal that publishes results of original theoretical and experimental research in relevant areas of the physics of the Earth''s interior and applied geophysics. The journal welcomes manuscripts from all countries in the English or Russian language.
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