Abstract

ALVARADO, Leonardo; ALVAREZ, Leonardo; SCHMITZ, Michael  and  RENDON, Herbert. 2D MODELLING OF THE SEISMIC RESPONSE FOR BARQUISIMETO AND CABUDARE CITIES FOR MICROZONATION STUDIES. bol.geol. [online]. 2015, vol.37, n.1, pp.45-55. ISSN 0120-0283.

The preliminary results of the 2D superficial seismic wave modeling along four cross sections through the Barquisimeto and Cabudare cities are presented. The 2D modeling was done using a technique that combines an analytical method (modal summation) with a numerical method (finite difference) in order to obtain the seismic response in terms of synthetic seismograms generation. We used two seismic scenarios with magnitude 6.0 and 7.0 Mw. The 2D/1D spectra ratio shows the vertical component of the acceleration with an amplification factor 6, around 2 Hz; whereas the horizontal components have amplification of factor 2, around 1 Hz. We also observed an increase in amplitude and duration of the seismic signal at the edge of the sedimentary basin

Keywords : Numerical modelling of seismic wave; hybrid method; seismic microzoning.

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