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  Diversity of the 2014 Iquique’s foreshocks and aftershocks: clues about the complex rupture process of a Mw 8.1 earthquake

León-Ríos, S., Ruiz, S., Maksymowicz, A., Leyton, F., Fuenzalida, A., Madariaga, R. (2016): Diversity of the 2014 Iquique’s foreshocks and aftershocks: clues about the complex rupture process of a Mw 8.1 earthquake. - Journal of Seismology, 20, 1059-1073.
https://doi.org/10.1007/s10950-016-9568-6

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Datensatz-Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_2638907 Versions-Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_2638907_2
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 Urheber:
León-Ríos, Sergio1, 2, Autor
Ruiz, Sergio1, 2, Autor
Maksymowicz, Andrei1, 2, Autor
Leyton, Felipe1, 2, Autor
Fuenzalida, Amaya1, 2, Autor
Madariaga, Raúl1, 2, Autor
Affiliations:
1External Organizations, ou_persistent22              
2IPOC, External Organizations, ou_2634889              

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Schlagwörter: Earthquake, Chile, Nazca Plate, Moment tensor, Erosive margin
 Zusammenfassung: We study the foreshocks and aftershocks of the 1 April 2014 Iquique earthquake of Mw 8.1. Most of these events were recorded by a large digital seismic network that included the Northern Chile permanent network and up to 26 temporary broadband digital stations. We relocated and computed moment tensors for 151 events of magnitude Mw ≥ 4.5. Most of the foreshocks and aftershocks of the Iquique earthquake are distributed to the southwest of the rupture zone. These events are located in a band of about 50 km from the trench, an area where few earthquakes occur elsewhere in Chile. Another important group of aftershocks is located above the plate interface, similar to those observed during the foreshock sequence. The depths of these events were constrained by regional moment tensor (RMT) solutions obtained using the records of the dense broad band network. The majority of the foreshocks and aftershocks were associated to the interplate contact, with dip and strike angles in good agreement with the characteristics of horst and graben structures (>2000 m offset) typical of the oceanic Nazca Plate at the trench and in the outer rise region. We propose that the spatial distribution of foreshocks and aftershocks, and its seismological characteristics were strongly controlled by the rheological and tectonics conditions of the extreme erosive margin of Northern Chile.

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Sprache(n): eng - Englisch
 Datum: 2016
 Publikationsstatus: Final veröffentlicht
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: DOI: 10.1007/s10950-016-9568-6
 Art des Abschluß: -

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Titel: Journal of Seismology
Genre der Quelle: Zeitschrift, SCI, Scopus
 Urheber:
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Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 20 Artikelnummer: - Start- / Endseite: 1059 - 1073 Identifikator: CoNE: https://gfzpublic.gfz-potsdam.de/cone/journals/resource/journals303