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| Format: | Artículo científico |
| Language: | en |
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Universidad Nacional Autónoma de México
2012
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| Online Access: | https://www.redalyc.org/articulo.oa?id=56823351007 |
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Table of Contents:
- Seismic characterization of station LNIG as a reference site in Northeast Mexico Luis G. Ramos-Zuñiga Juan C. Montalvo-Arrieta Xyoli Pérez-Campos Carlos Valdés-González Ciencias de la Tierra VS30 microtremores V spectral ratios Sierra Madre Oriental Seismic reference site Station LNIG is part of the new generation of seismological observatories that have been recently installed in Mexico by the Servicio Sismológico Nacional (Mexico). This stationstarted operations in January 2006 in the Facultad de Ciencias de la Tierra from the Universidad Autónoma de Nuevo León, in Linares, Nuevo León, Mexico. We evaluate the site response at LNIG according to the definition of standard reference rock site. We obtained (a) the average shear wave velocity for the first 30 m depth, VS30, and (b) the resonance frequency. We got VS30 = 1870 m/s from seismic refraction profiles. This corresponds to a hard rock site type A in accordance to NEHRP. On the other hand, the spectral ratios were obtained from microtremors and local weak-motion earthquakes (3.1 ¿ M ¿ 4.5), they show a flat response (unitary amplitude) for the frequency range from 0.2 to 20 Hz. According to the definition proposed by Steidl et al. (1996) and Cadet et al. (2010), the LNIG site, located on shale of the Mendez Formation of the Upper Cretaceous, corresponds to a reference site. 2012 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56823351007 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.2 Vol.51