Quantitative Evaluation of Coseismic Deformations Induced by Seismogenic Faulting in Mining Exploration Area During the 2018 Xingwen and 2019 Changning Earthquakes, Sichuan, China

In the period between December 2018 and July 2019, a series of earthquakes (EQs), including 16 Ms 5.7 Xingwen mainshock 17 June 2019 6.0 Changning mainshock, struck shale gas exploration field in southern margin Sichuan Basin. The EQs both occurred on concealed faults, which led to hundreds casualties, affected total over 160 thousand people Sichuan. aftershock sequences following were clustered vicinity Jianwu syncline anticline, respectively, mostly at depths 3–7 km. this study, coseismic surface deformation measurements obtained through differential interferometric synthetic aperture radar (D-InSAR) data used identify faulting geometries distributions. maps have maximum line-of-sight (LOS) displacements ∼4.53 cm northwest side EQ source fault ∼7.84 southwest fault. calculated static Coulomb stress changes indicated that most aftershocks increasing zones ruptures. From InSAR field, complicated seismogenic doublet was inferred, predominately exhibited left-lateral strike-slip motion during EQs. footwall ramp basement reactivated first, resulted concentrating stresses beneath induced half year later. Compared with previous studies, we proposed network lubricated by water injected exploration, facilitating occurrence Such work evaluated deformations EQs, derived regional distribution from sequences. It could provide useful information for monitoring analyzing seismic activity around hinge folds mining areas, contributes effective risk assessment disasters associated geo-environments.