Earthquake segmentation in northern Chile correlates with curved plate geometry
Author
dc.contributor.author
Shrivastava, Mahesh N.
Author
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González, Gabriel
Author
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Moreno, Marcos
Author
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Soto, Hugo
Author
dc.contributor.author
Schurr, Bernd
Author
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Salazar, Pablo
Author
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Báez, Juan Carlos
Admission date
dc.date.accessioned
2019-10-15T12:25:39Z
Available date
dc.date.available
2019-10-15T12:25:39Z
Publication date
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2019
Cita de ítem
dc.identifier.citation
Scientific Reports, Volumen 9, Issue 1, 2019,
Identifier
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20452322
Identifier
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10.1038/s41598-019-40282-6
Identifier
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https://repositorio.uchile.cl/handle/2250/171751
Abstract
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We performed an integrated analysis of the coseismic slip, afterslip and aftershock activity of the 2014 M w 8.1 Pisagua earthquake. This earthquake seems to be spatially located between two major historical earthquakes, the 1868 M w 8.8 earthquake in southern Peru and the 1877 M w 8.5 earthquake in northern Chile. Continuous GPS data were used to model the coseismic slip of the mainshock and the largest aftershock (M w 7.6). The afterslip was modeled for 273 days (end of year 2014) after the largest aftershock, revealing two patches of afterslip: a southern patch between the mainshock and the largest aftershock and a patch to the north of the mainshock. Observations from the seismic network indicate that aftershocks were concentrated near the southern patch. Conversely, the northern patch contained hardly any aftershocks, indicating a dominant aseismic slip. The Pisagua earthquake occurred within a prominent, curved section of the Andean subduction zone. This se