Local earthquake monitoring offshore Valparaiso, Chile.

Thierer, P. O. and Flueh, E. R. and Kopp, H. and Tilmann, F. J. and Comte, D. and Contreras, S. (2005) Local earthquake monitoring offshore Valparaiso, Chile. Neues Jahrbuch für Geologie und Paläontologie: Abhandlungen, 236. pp. 173-183.

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Abstract

On the central Chilean continental margin off Valparaiso a temporary marine seismological network on the incoming Nazca Plate was supplemented by the Central Chilean Network and a number of temporary landstations. Simultaneous inversion of the complete marine earthquake data set yielded hypocenter distributions from minimum 1-D modeling. These show a considerable seismic activity within the 15 km – 60 km depth range with a maximum number of events between 20 km and 40 km. The distribution shows three areas of increased activity: the O’Higgins Seamount Group on the oceanic plate, the San Antonia Canyon and the northeastern portion of the Valparaiso Basin. There is a marked difference on the distance between the trench and the onset of seismic activity between the San Antonia Canyon areas and the Valparaiso Basin area.

Item Type: Article
Uncontrolled Keywords: 2005 AREP 2005 P IA49
Subjects: 02 - Geodynamics, Geophysics and Tectonics
Divisions: 02 - Geodynamics, Geophysics and Tectonics
Journal or Publication Title: Neues Jahrbuch für Geologie und Paläontologie: Abhandlungen
Volume: 236
Page Range: pp. 173-183
Depositing User: Sarah Humbert
Date Deposited: 13 Aug 2010 11:12
Last Modified: 23 Jul 2013 09:59
URI: http://eprints.esc.cam.ac.uk/id/eprint/1843

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