Abstract
The geomechanical modeling results on the stress-strain state dynamics before the 2019 M = 7.1 Ridgecrest earthquake, Southern California, show the alternating development of maximum displacements at the fault’s ends, which simulates the process of “swinging” of the epicentral zone of the earthquake. These results together with the existing theoretical ideas about the block structure of the Earth’s crust and the corresponding connections between blocks are used to construct a geomechanical “swing” model based on the stick-slip motion of three interconnected blocks. The model parameters are related to the rheological properties of the Earth’s crust in the region of the rupture of the bridging isthmus which determines the source size of the seismic event.
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