Earthquake segmentation in northern Chile correlates with curved plate geometry View Full Text


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Article Info

DATE

2019-12

AUTHORS

Mahesh N. Shrivastava, Gabriel González, Marcos Moreno, Hugo Soto, Bernd Schurr, Pablo Salazar, Juan Carlos Báez

ABSTRACT

We performed an integrated analysis of the coseismic slip, afterslip and aftershock activity of the 2014 Mw 8.1 Pisagua earthquake. This earthquake seems to be spatially located between two major historical earthquakes, the 1868 Mw 8.8 earthquake in southern Peru and the 1877 Mw 8.5 earthquake in northern Chile. Continuous GPS data were used to model the coseismic slip of the mainshock and the largest aftershock (Mw 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 section may have acted as a barrier for the largest historical earthquakes and as an isolated segment during the Pisagua earthquake. More... »

PAGES

4403

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/s41598-019-40282-6

DOI

http://dx.doi.org/10.1038/s41598-019-40282-6

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1112734658

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/30867445


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