Earthquake segmentation in northern Chile correlates with curved plate geometry

Shrivastava, Mahesh N.; González, Gabriel; Moreno, M.; Soto, Hugo; Schurr, B.; Salazar, Pablo; Báez, Juan Carlos

doi:10.1038/s41598-019-40282-6

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Earthquake segmentation in northern Chile correlates with curved plate geometry

Authors

Shrivastava, Mahesh N.
External Organizations;
IPOC, External Organizations;

González, Gabriel
External Organizations;
IPOC, External Organizations;

/persons/resource/marcos

Moreno, M.
4.1 Lithosphere Dynamics, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
IPOC, External Organizations;

/persons/resource/soto

Soto, Hugo
4.1 Lithosphere Dynamics, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
IPOC, External Organizations;

/persons/resource/schurr

Schurr, B.
4.1 Lithosphere Dynamics, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
IPOC, External Organizations;

Salazar, Pablo
External Organizations;
IPOC, External Organizations;

Báez, Juan Carlos
External Organizations;
IPOC, External Organizations;

External Ressource

No external resources are shared

Fulltext (public)

4161893.pdf
(Publisher version), 4MB

Supplementary Material (public)

There is no public supplementary material available

Citation

Shrivastava, M. N., González, G., Moreno, M., Soto, H., Schurr, B., Salazar, P., Báez, J. C. (2019): Earthquake segmentation in northern Chile correlates with curved plate geometry. - Scientific Reports, 9, 4403.
https://doi.org/10.1038/s41598-019-40282-6

Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_4161893

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.