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  The role of interplate locking on the seismic reactivation of upper plate faults on the subduction margin of northern Chile

González, G., Pasten-Araya, F., Victor, P., González, Y., Valenzuela, J., Shrivastava, M. (2021): The role of interplate locking on the seismic reactivation of upper plate faults on the subduction margin of northern Chile. - Scientific Reports, 11, 21444.
https://doi.org/10.1038/s41598-021-00875-6

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 Creators:
González, Gabriel1, Author
Pasten-Araya, Francisco1, Author
Victor, Pia2, Author              
González, Yerko1, Author
Valenzuela, Jordán1, Author
Shrivastava, Mahesh1, Author
Affiliations:
1External Organizations, ou_persistent22              
24.1 Lithosphere Dynamics, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, ou_146034              

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Free keywords: seismology, tectonics
 Abstract: Quaternary deformation in the northern Chile forearc is controlled by trench parallel shortening along reactivated Mesozoic faults. Dextral strikes-slip is expressed in NW–SE striking faults of the Atacama Fault System, and reverse displacement dominates in E–W faults. This deformation results of the convergence in a concave-seaward continental margin. On September 11th, 2020, a Mw 6.3 earthquake and its subsequent aftershocks took place in the coastal region of northern Chile, revealing the reactivation of the deepest segment of a WNW–ESE striking upper plate fault. The reactivation of this fault occurred after the Mw 8.1 Iquique earthquake, and it seems to be connected to a N–S interplate locking segmentation of the plate margin, which is clearly shown by the locking pattern before the Iquique earthquake. This poses the question of how heterogeneous locking influences upper plate seismicity and how it relates to trench-parallel shortening.

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Language(s): eng - English
 Dates: 2021-11-022021
 Publication Status: Finally published
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 Identifiers: DOI: 10.1038/s41598-021-00875-6
GFZPOF: p4 T3 Restless Earth
OATYPE: Gold Open Access
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Title: Scientific Reports
Source Genre: Journal, SCI, Scopus, OA
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Pages: - Volume / Issue: 11 Sequence Number: 21444 Start / End Page: - Identifier: CoNE: https://gfzpublic.gfz-potsdam.de/cone/journals/resource/journals2_395
Publisher: Springer Nature