Darwin seismic gap closed by the 2010 Maule earthquake
- The Maule earthquake (Mw 8.8) that affected south-central Chile on February 27, 2010 was preceded by the 1835 event documented by FitzRoy and Darwin. The relation between both events has been controversial. Fault slip in 2010 estimated by Lorito et al. (2011) is less than expected from 175 years of strain accumulation, leading them to conclude only limited overlap between the 2010 and 1835 events, and that a Mw 7.5-8 event could still strike the Concepcion region. However, Lorito et al.'s model was based on displacements obtained from only 6 GPS stations and underpredicts observations from recent studies. Here we show that an alternative model based on 169 GPS displacements reproduces the data better, suggesting Lorito et al.'s main conclusion is not correct. Based on a slip deficit map, we suggest the seismic gap opened in 1835 was most likely closed in 2010.
Author details: | Daniel MelnickORCiDGND, Marcos MorenoORCiD, Marco Cisternas, Andres Tassara |
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DOI: | https://doi.org/10.5027/andgeoV39n3-a11 |
ISSN: | 0718-7092 |
Title of parent work (English): | Andean geology |
Publisher: | Servicio Nacional de Geologìa y Minerìa |
Place of publishing: | Santiago |
Publication type: | Article |
Language: | English |
Year of first publication: | 2012 |
Publication year: | 2012 |
Release date: | 2017/03/26 |
Tag: | Coseismic slip distribution; Maule earthquake; Seismic gap; Slip deficit |
Volume: | 39 |
Issue: | 3 |
Number of pages: | 6 |
First page: | 558 |
Last Page: | 563 |
Funding institution: | German Science Foundation (DFG, Deutsche Forschungsgemeinschaft) [ME3157/2-1, MO2310/1-1]; Chilean Science Foundation (Conicyt) Fondecyt [1110848, 1101034]; GeoForschungsZentrum Potsdam |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Geowissenschaften |
Peer review: | Referiert |
Publishing method: | Open Access |
Institution name at the time of the publication: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Erd- und Umweltwissenschaften |