Articles

  Boletín de la Sociedad Geológica Mexicana
Número Especial de Geología Urbana
Tomo 58, Núm. 2, 2006, P. 215-221
 

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.

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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.

Key words: seismic zonation, State of Tlaxcala, seismicity, focal mechanisms.