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Active tectonics in the Gulf of California and seismicity (M > 3.0) for the period 2002–2014

Castro, R. R. and Stock, J. M. and Hauksson, E. and Clayton, R. W. (2017) Active tectonics in the Gulf of California and seismicity (M > 3.0) for the period 2002–2014. Tectonophysics . ISSN 0040-1951. (In Press) http://resolver.caltech.edu/CaltechAUTHORS:20170222-145907573

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Abstract

We present a catalog of accurate epicenter coordinates of earthquakes located in the Gulf of California (GoC) in the period 2002–2014 that permits us to analyze the seismotectonics and to estimate the depth of the seismogenic zone of this region. For the period April 2002 to December 2014 we use body-wave arrival times from regional stations of the Broadband Seismological Network of the GoC (RESBAN) operated by CICESE to improve hypocenter locations reported by global catalogs. For the northern region of the GoC (30°N–32°N) we added relocated events from the 2011-Hauksson-Yang-Shearer, Waveform Relocated Earthquake Catalog for Southern California (Hauksson et al., 2012; Lin et al., 2007). From October 2005 to October 2006 we incorporated hypcenters located by Sumy et al. (2013) in the southern GoC combining an array of ocean-bottom seismographs, of the SCOOBA experiment, with onshore stations of the NARS-Baja array. This well constrained catalog of seismicity highlights zones of active tectonics and seismic deformation within the North America-Pacific plate boundary. We estimate that the minimum magnitude of completeness of this catalog is Mc = 3.3 ± 0.1 and the b = 0.92 ± 0.04 value of the Gutenberg-Richter relation. We find that most earthquakes in the southern GoC are generated by transform faults and this region is more active than the central GoC region. However, the northern region, where most deformation is generated by oblique faults is as active as the southern region. We used the ISC catalog to evaluate the size distribution of seismicity of these regions, and the b value of the Gutenberg-Richter relation and found that b is slightly lower in the central GoC (b = 0.86 ± 0.02) compared to the northern (b = 1.14 ± 0.04) and the southern (b = 1.11 ± 0.04) regions. We observed seismicity that occurs in the Stable Central Peninsular Province, despite the fact that significant active deformation has not been identified in this region.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.tecto.2017.02.015DOIArticle
http://www.sciencedirect.com/science/article/pii/S0040195117300707PublisherArticle
ORCID:
AuthorORCID
Stock, J. M.0000-0003-4816-7865
Hauksson, E.0000-0002-6834-5051
Clayton, R. W.0000-0003-3323-3508
Additional Information:© 2017 Elsevier B.V. Received 29 July 2016, Revised 14 February 2017, Accepted 20 February 2017, Available online 22 February 2017. This paper was prepared while the first author (RRC) was on sabbatical year in Caltech. We thank CONACYT and Prof. Michael Gurnis for the support provided. The operation of the RESBAN network has been possible thanks to the financial support of the National Council of Science and Technology, Mexico (CONACYT) (projects CB-2011-01-165401(C0C059), G33102-T and 59216). Antonio Mendoza Camberos pre-process the data from the RESBAN network and Arturo Perez Vertti maintains and operates the stations. The authors thank the editors and the comments and suggestions of two anonymous reviewers.
Group:Seismological Laboratory
Funders:
Funding AgencyGrant Number
Consejo Nacional de Ciencia y Tecnología (CONACYT)CB-2011-01-165401
Consejo Nacional de Ciencia y Tecnología (CONACYT)G33102-T
Consejo Nacional de Ciencia y Tecnología (CONACYT)59216
Subject Keywords:Seismotectonics; Gulf of California, Mexico; Seismicity catalog
Record Number:CaltechAUTHORS:20170222-145907573
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20170222-145907573
Official Citation:R.R. Castro, J.M. Stock, E. Hauksson, R.W. Clayton, Active tectonics in the Gulf of California and seismicity (M > 3.0) for the period 2002–2014, Tectonophysics, Available online 22 February 2017, ISSN 0040-1951, http://dx.doi.org/10.1016/j.tecto.2017.02.015. (http://www.sciencedirect.com/science/article/pii/S0040195117300707)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:74473
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:01 Mar 2017 04:03
Last Modified:01 Mar 2017 04:03

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