STRON GGROUND MOTION SIMULATIONS AND ASSESMENT OF INFLUENCE OF MODEL PARAMETERS...

• Author(s): Zadonina, E. ; Caldeira, Bento ; Bezzeghoud, Mourad ; Borges, José
• Date: 2011
• Persistent ID: http://hdl.handle.net/10174/3695
• Origin: Repositório Científico da Universidade de Évora
• Subject(s): Strong Ground Motion; 3D modelling; wavelet transform; Finite difference method
• Document Type: Lecture
• Language: English

Description

Modeling near-field ground motion is an important and useful tool of modern seismology. It helps in studies of seismic events and mitigation of seismic hazards. Several approaches are widely used to obtain synthetic ground motion for a finite earthquake source. In our work we use a finite difference algorithm, developed for 3D structures and kinematic source model, to compute near-field ground motions from a real moderate event with pre-existing slip distribution model. Lately, synthetic seismograms are quantitatively compared with observed waveforms from near-field seismic stations in order to justify created model. Furthermore, we independently changed several source parameters (rupture velocity, source dimension and geometry), and structure (velocity model) in order to evaluate their influence on the waveforms. We applied quantitative misfit criteria, based on wavelet transform, for the comparison of seismograms