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Coseismic and postseismic deformation of the 2016 Mw 6.0 Petermann ranges earthquake from satellite radar observations

Lookup NU author(s): Chen YuORCiD



This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).


© 2021 COSPAR. Continental earthquakes, especially shallow earthquakes, can cause disasters in populated areas. On 20 May 2016, a moderate magnitude earthquake (Mw 6.0) ruptured on Northern Territory of Australia. With the aim of seismic hazard assessment, coseismic and postsesmic deformation of the Petermann earthquake has been determined using ALOS-2 ascending and Sentinel-1A descending images. The coseismic deformation field suggests that the earthquake ruptured in the NNW direction with a length of about 20 km, a rake angle of 57.1° and a moment magnitude of Mw 6.06. The maximum slip of 1.31 m can be observed at the depth of 1.25 km. The small baseline subset (SBAS) InSAR was utilized to obtain the postseismic deformation from 69 Sentinel-1A images in a descending orbit. The spatiotemporal evolution of the postseismic deformation presents a gradually decaying trend, with a maximum displacement of 5.4 cm within 858 days after the mainshock. Our afterslip model suggests that the maximum slip of 0.28 m occurred at the depth of 0.25 km with a slight shift to the northwest compared to the coseismic slip. The static Coulomb failure stress (CFS) changes at various depths were calculated, indicating the consistency between high loaded stress zones and aftershock distribution.

Publication metadata

Author(s): Han B, Yang C, Li Z, Yu C, Zhao C, Zhang Q

Publication type: Article

Publication status: Published

Journal: Advances in Space Research

Year: 2022

Volume: 69

Issue: 1

Pages: 376-385

Print publication date: 01/01/2022

Online publication date: 29/10/2021

Acceptance date: 24/10/2021

Date deposited: 07/01/2022

ISSN (print): 0273-1177

ISSN (electronic): 1879-1948

Publisher: Elsevier Ltd


DOI: 10.1016/j.asr.2021.10.043


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Funder referenceFunder name
China Geological Disaster Investigation Project (Ref.: DD20190637)
CHD (Refs.: 300102260301 and 300102261108)
Fundamental Research Funds for the Central Universities
National Natural Science Foundation of China (NSFC) (Refs.: 41941019, 41731066 and 42174032)
Shaanxi Province Science and Technology Innovation team (Ref. : 2021TD-51)
State's Key Project of Research and Development Plan (Ref.: 2018YFC1504805)