The 2019 Ridgecrest Large Earthquake in Southern California: Studying the Source Formation Based on Geomechanical Modelling

V. G. Bondur, M. B. Gokhberg, I. A. Garagash, D. A. Alekseev, E. V. Gaponova

Research output: Contribution to journalArticlepeer-review

Abstract

Abstract: Here we present a simulation of the crust’s stress–strain state in the period prior to the 2019 Ridgecrest (M = 7.1) earthquake in Southern California. In the framework of the geomechanical model accounting for the ongoing weak seismicity, the pattern of the spatial and temporal distributions of anomalous shear strains has been revealed. It has also been shown that the source was formed as an alternate development of fractures at the ends of the future rupture, which manifested itself as an anomalous deformation of a dumbbell shape. Unlike previous theoretical and laboratory studies, here we examine the temporal development of a process that had not been considered before. It has been found that analysis of the displacement vector plays a significant role in identification of the zone of source formation. The source is effectively formed only when these directions are stabilized and close to the direction of the shear in the source of a future earthquake, which is determined from satellite monitoring data.

Original languageEnglish
Pages (from-to)41-45
Number of pages5
JournalDoklady Earth Sciences
Volume502
Issue number1-2
DOIs
Publication statusPublished - Feb 2022
Externally publishedYes

Keywords

  • earthquake
  • earthquake forecast
  • geomechanical model
  • Ridgecrest
  • Southern California
  • strain observations
  • stress–strain state

Fingerprint

Dive into the research topics of 'The 2019 Ridgecrest Large Earthquake in Southern California: Studying the Source Formation Based on Geomechanical Modelling'. Together they form a unique fingerprint.

Cite this