HR: 1340h
AN: S53A-1071    [Abstracts]
TI: Strong Ground Motions Scenarios for Mexico City
AU: Cabrera, E
EM: eccf@super.unam.mx
AF: DGSCA, UNAM, Ciudad Universitaria, Mexico City, 04510 Mexico
AU: * Chavez, M
EM: marioch48@yahoo.com
AF: Inst. de Ingenieria, UNAM, Apdo. 70-569, Mexico City, 04510 Mexico
AU: * Chavez, M
EM: marioch48@yahoo.com
AF: Lab. de Geologie, Dept. TAO, ENS, 24 Rue Lhomond, Paris, 75005 France, Metropolitan
AU: Madariaga, R
EM: raul.madariaga@)ens.fr
AF: Lab. de Geologie, Dept. TAO, ENS, 24 Rue Lhomond, Paris, 75005 France, Metropolitan
AU: Mai, P M
EM: martin@seismo.ifg.ethz.ch
AF: Inst. Geophysics, ETH, Hoenggeberg, Zurich, CH-8093 Switzerland
AU: Frisenda, M
EM: mfrisenda@yahoo.it
AF: DIPTERIS, Univ. of Genoa, Viale Benedetto XV, 5, Genova, 05 Italy
AU: Perea, N
EM: narpere@hotmail.com
AF: Inst. de Ingenieria, UNAM, Apdo. 70-569, Mexico City, 04510 Mexico
AB: The recordings available in Mexico City (MC) for extreme magnitude Subduction Superficial (SS), Subduction Deep (SD), and Crustal Superficial (CS) events are about 30 accelerograms (obtained at 10 sites) for the SS 19 09 1985 earthquake (Ms 8.1, Mw 8.01). In this work we generated broadband synthetic accelerograms expected in MC stiff (S) and compressive soils (C),for SS (Mw 8.5, 8.7), SD (Mw 7.6) and CS (Mw 7.5) earthquakes.The frequencies lower than 0.5 Hz were simulated by using a 4th order FD method, including a (fractal) finite-fault description of the sources. The frequencies larger than 0.5 Hz were modeled by the empirical Green function technique. We propose upper bounds of 0.4g and 2g (g=9.8m/s2)for the maximum response spectra acceleration(5 percent damping) expected in the S and C soils of MC, respectively.
DE: 7209 Earthquake dynamics (1242)
SC: Seismology [S]
MN: Fall Meeting 2005