摘要 : The Jinghe, Xinjiang, earthquake on 8 August 2017 is not only one of the largest events that happened along the north Tien Shan but also the first Mw> 6 event that received adequate seismic and geodetic observations in this region... 展开 The Jinghe, Xinjiang, earthquake on 8 August 2017 is not only one of the largest events that happened along the north Tien Shan but also the first Mw> 6 event that received adequate seismic and geodetic observations in this region, providing a rare chance to gain insights into the faults that bound the Tien Shan. A previous rupture model (Zhang et al., 2020) was built based on a hypothesis of a north-dipping seismogenic fault, but field geological mapping suggests the fault to be south dipping. Different fault geometry would result in different rupture scenarios. Here, we reconstructed the coseismic ground deformation with Global Navigation Satellite Systems (GNSS) observations and Sentinel-1A interferograms, modeled the rupture process on the geologically consistent and teleseismic P waveforms. Our results demonstrate that this earthquake occurred on a ramp fault buried under the foothills of the north Tien Shan, with strike of 86.8?? and dip of 46??. The unidirectional coseismic rupture extended 20 km along strike and down to a depth of 20 km with an average rupture velocity around 1.9 km/s. Primary slip occurred within 3???7 s after the rupture initiation with a peak of 0.38 m. This event released 3:78 ?? 1018 N??m seismic moment, corresponding to Mw 6.31. Modeling the interseismic deformation shows that the seismogenic fault of the 2017 Jinghe event absorbs about 5.2 ?? 1.0 mm/yr crustal shortening between the Junngar basin and the north Tien Shan. The recurrence interval for earthquakes of the same magnitude as the 2017 Jinghe earthquake is estimated to be 73 ?? 14 yr based on the coseismic slip and interseismic slip rate. 收起