Russian Journal of Earth Sciences Russian Journal of Earth Sciences Russian Journal of Earth Sciences 1681-1208 50304 10.2205/2022ES000798 ОРИГИНАЛЬНЫЕ СТАТЬИ ORIGINAL ARTICLES ОРИГИНАЛЬНЫЕ СТАТЬИ Features of the modelled stress-strain state dynamics prior to the M7.1 2019 Ridgecrest earthquake in Southern California Features of the modelled stress-strain state dynamics prior to the M 7.1 2019 Ridgecrest earthquake in Southern California Бондур В. Г. Bondur V. G. Гохберг М. В. Gokhberg M. B. Гарагаш И. А. Garagash I. A. Alekseev Dmitry Aleksandrovich Alekseev Dmitry Aleksandrovich alexeevgeo@gmail.com AEROCOSMOS Research Institute for Aerospace Monitoring ru AEROCOSMOS Research Institute for Aerospace Monitoring ru Schmidt Institute of Physics of the Earth, Russian Academy of Sciences ru Schmidt Institute of Physics of the Earth, Russian Academy of Sciences ru Schmidt Institute of Physics of the Earth, Russian Academy of Sciences ru Schmidt Institute of Physics of the Earth, Russian Academy of Sciences ru Институт физики Земли им. О.Ю.Шмидта РАН Москва Россия Schmidt Institute of Physics of the Earth Moscow Russian Federation 04 12 2022 04 12 2022 22 5 1 19 11 05 2022 26 05 2022 https://rjes.ru/en/nauka/article/50304/view

The paper is concerned with the analysis of the simulated stress-strain state (SS) parameters of the earth's crust over the four-year period preceding the M7.1 2019 Ridgecrest earthquake in Southern California. SS parameters have been calculated using a detailed geomechanical model, taking into account an ongoing weak seismicity catalog data. Cyclic patterns are identified in the observed shear strain anomalies, with estimation of their spatial and temporal characteristics, and an attempt is made to track the influence of the local displacement direction and periodic migration of shear strain anomalies in the upper crust on the earthquake preparation. Finally, we discuss the role of the observed regularities in terms of existing models describing the earthquake preparation process.

The paper is concerned with the analysis of the simulated stress-strain state (SS) parameters of the earth's crust over the four-year period preceding the M7.1 2019 Ridgecrest earthquake in Southern California. SS parameters have been calculated using a detailed geomechanical model, taking into account an ongoing weak seismicity catalog data. Cyclic patterns are identified in the observed shear strain anomalies, with estimation of their spatial and temporal characteristics, and an attempt is made to track the influence of the local displacement direction and periodic migration of shear strain anomalies in the upper crust on the earthquake preparation. Finally, we discuss the role of the observed regularities in terms of existing models describing the earthquake preparation process.

 Geomechanical modelling shear strain earthquakes stress-strain state stress anomaly excursions precursors monitoring South California Ridgecrest. Geomechanical modelling shear strain earthquakes stress-strain state stress anomaly excursions precursors monitoring South California Ridgecrest. We'd like to acknowledge the helpful discussions and advice from our colleagues at Schmidt Institute of Physics of the Earth RAS. The study was supported by Institute for Scientific Research of Aerospace Monitoring "AEROCOSMOS" (project No. 122011800095-3) We'd like to acknowledge the helpful discussions and advice from our colleagues at Schmidt Institute of Physics of the Earth RAS. The study was supported by Institute for Scientific Research of Aerospace Monitoring "AEROCOSMOS" (project No. 122011800095-3)

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