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Boletín de la Sociedad Geológica Mexicana
http://dx.doi.org/10.18268/BSGM2006v58n2a4 |
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Zonificación sísmica del Estado de Tlaxcala, México
Javier Lermo-Samaniego*, Isabel Bernal-Esquia
Instituto de Ingeniería, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 México, D.F.
*This email address is being protected from spambots. You need JavaScript enabled to view it.
Abstract
For the evaluation and analysis of the seismicity that is generated in the State of Tlaxcala, we have analyzed 45 earthquakes that occurred between 1984 and 2004 (Md<4.0). Almost 70% of such earthquakes is associated with the activity of the Puebla Graben. This agrees with the location of fault systems and oriented focal mechanisms, mainly E-W. These seismotectonic characteristics allowed to establish a seismic zonation, that consists of a high (I), medium (II) and low (III) seismicity zones. Zone I, the one that bears greatest potential seismic hazard contains the cities with greater population density of this state: Tlaxcala, Santa Ana Chiautempan, Contla y Apizaco.
Keywords: seismic zonation, State of Tlaxcala, seismicity, focal mechanisms.
