Resumo

LERMO-SAMANIEGO, Javier  e  BERNAL-ESQUIA, Isabel. Seismic zonification of the State of Tlaxcala, Mexico. Bol. Soc. Geol. Mex [online]. 2006, vol.58, n.2, pp.215-221. ISSN 1405-3322.  https://doi.org/10.18268/bsgm2006v58n2a4.

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.

Palavras-chave : seismic zonation; State of Tlaxcala; seismicity; focal mechanisms.