Geometry of the Benioff zone in the Tehuantepec area in Southern México
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Abstract
Using data from a local seismic network operating in Chiapas, Southern Mexico, in 1979 plus two permanent stations VHO and COM, the geometry of the Benioff zone below 60 km depth was accurately mapped in the Tehuantepec area. The hypocenters were found to be confined within a slab of thickness 45 km, dip 45º and strike N 450ºE. The only active volcano in the area, The Chichón, is situated about 225 km above the center of the Benioff zone.
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