| Autor: |
Li, Jie, Liu, Gang, Qiao, Xuejun, Xiong, Wei, Wang, Xiaoqiang, Liu, Daiqin, Sun, Jianing, Yushan, Ailixiati, Yusan, Sulitan, Fang, Wei, Wang, Qi |
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| Zdroj: |
Pure & Applied Geophysics; Feb2018, Vol. 175 Issue 2, p573-585, 13p |
| Abstrakt: |
The 25 November 2016 Aketao, Xinjiang earthquake occurred on the northeastern margin of the Pamir plateau, rupturing the Muji fault on the northern segment of the Kongur Extensional System. We collected coseismic offsets at 7 GPS sites, which show that the fault experienced significate dextral slip with a near-field geodetic displacement of up to 12 cm along the strike. The joint inversion of GPS data and teleseismic P waveforms suggests a complex rupture pattern characterized by the unilateral propagation slip from the epicenter to the southeast for 60 km with a total seismic moment of ~ 1.3 × 1019 Nm, corresponding to a magnitude of Mw 6.7 earthquake. Our model of slip distribution shows two major slip patches with a slip amplitude up to ~ 0.6 m, one located at shallow depths of 0–8 km close to the hypocenter with apparent surface breaks and the other, ~ 40 km to the southeast, buried at a greater depth of ~ 12 km. The rupture is dominated by a right-lateral strike slip with significant normal-slip components. The near-field GPS data enhances the spatial resolution of source model. Based on the preferred slip model, the static Coulomb Failure Stress change caused by 2016 Aketao earthquake suggests that the unzipped western and eastern ends of Muji fault and the northern segment of Kungai Fault are significantly promoted. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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