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  Coseismic slip and afterslip of the 2015 Mw 8.3 Illapel (Chile) earthquake determined from continuous GPS data

Shrivastava, M. N., González, G., Moreno, M., Chlieh, M., Salazar, P., Reddy, C. D., Báez, J. C., Yáñez, G., González, J., de la Llera, J. C. (2016): Coseismic slip and afterslip of the 2015 Mw 8.3 Illapel (Chile) earthquake determined from continuous GPS data. - Geophysical Research Letters, 43, 20, 10710-10719.
https://doi.org/10.1002/2016GL070684

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Shrivastava, Mahesh N.1, Autor
González, Gabriel1, Autor
Moreno, M.2, Autor              
Chlieh, Mohamed1, Autor
Salazar, Pablo1, Autor
Reddy, C. D.1, Autor
Báez, Juan Carlos1, Autor
Yáñez, Gonzalo1, Autor
González, Juan1, Autor
de la Llera, Juan Carlos1, Autor
Affiliations:
1External Organizations, ou_persistent22              
24.1 Lithosphere Dynamics, 4.0 Geomaterials, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, ou_146034              

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 Zusammenfassung: We analyzed the coseismic and early postseismic deformation of the 2015, Mw 8.3 Illapel earthquake by inverting 13 continuous GPS time series. The seismic rupture concentrated in a shallow (<20 km depth) and 100 km long asperity, which slipped up to 8 m, releasing a seismic moment of 3.6 × 1021 Nm (Mw = 8.3). After 43 days, postseismic afterslip encompassed the coseismic rupture. Afterslip concentrated in two main patches of 0.50 m between 20 and 40 km depth along the northern and southern ends of the rupture, partially overlapping the coseismic slip. Afterslip and aftershocks confined to region of positive Coulomb stress change, promoted by the coseismic slip. The early postseismic afterslip was accommodated ~53% aseismically and ~47% seismically by aftershocks. The Illapel earthquake rupture is confined by two low interseismic coupling zones, which coincide with two major features of the subducting Nazca Plate, the Challenger Fault Zone and Juan Fernandez Ridge.

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Sprache(n): eng - Englisch
 Datum: 2016
 Publikationsstatus: Final veröffentlicht
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 Identifikatoren: DOI: 10.1002/2016GL070684
GFZPOF: p3 PT2 Plate Boundary Systems
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Titel: Geophysical Research Letters
Genre der Quelle: Zeitschrift, SCI, Scopus, ab 2023 oa
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Seiten: - Band / Heft: 43 (20) Artikelnummer: - Start- / Endseite: 10710 - 10719 Identifikator: CoNE: https://gfzpublic.gfz-potsdam.de/cone/journals/resource/journals182