Madrid, España
Resúmenes XII Reunión Nacional de Cuaternario, Ávila (2007) 155MORFOTECTÓNICA Y RECURRENCIA PALEOSÍSMICA DE LA ZONA DE FALLA DE EL SALVADOR (SEGMENTO DEL VOLCÁN SAN VICENTE) J.J. Martínez-Díaz (1), C. Canora (1), J. A. Álvarez-Gómez (1), R. Capote (1), M. Tsige (1), M. Béjar (1), P. Villamor (2) y K. Berryman (2) (1) Dpto. de Geodinámica, Universidad Complutense de Madrid. C/ J. Antonio Novais, 2. 28040-Madrid. jmdiaz@geo.ucm.es. (2) GNS Science, Nueva Zelanda. P.Villamor@gns.cri.nz Abstract (Morphotectonics and paleoseismic recurrence of the El Salvador Fault Zone, San Vicente volcano segment):In this work we present the first evidence of paleoseismic activity on the El Salvador Fault Zone, a 150 km long E-W strike-slip fault that was the source of the disastrous Mw 6.6 2001 earthquake of El Salvador. The Holocene activity of this fault deforms the fluvial terraces producing 800 m of cumulative offset of the Jiboa river. Preliminary paleoseismic analysis of the Ilopango-San Vicente segment and the first numerical datings of several displaced paleosoils layers provide evidence of more than two surface-rupturing earthquakes during the past 8100 yr.
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