I Congreso de Postgrado fcfm: ingeniería, ciencias e innovación

64 Santiago, 10 al 12 de agosto, 2022 STOCHASTIC STRONG-MOTION SIMULATION OF VALPARAISO 1985 MW 8.0 CHILE EARTHQUAKE Rogelio Torres-Cuenca ¹ and Sergio Ruiz ¹ ¹Departament de G ofísica, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Santiago, Chile. Email: md.rogelio.tc@gmail.com RESUMEN Historical and recent earthquakes have been studied in the Central Chile to know the characteristics of seismic rupture of large events and to estimate their seismic hazard. On 3 March 1985 the Valparaíso earthquake with Mw 8.0 occurred off the coast of Central Chile. Mostly the studies have modeled their earthquake rupture using low frequencies. For the earthquake engineering is necessary model the high frequency rupture to estimate cor- rectly the strong motion records. In general, the high frequency waves are generated from different zones other than low-frequency waves. Here, we propose a source model for the high frequencies whit the appropriate param- eters to reproduce the strong motion records (Otarola and Ruiz 2016). A stochastic method is used to model the horizontal and the vertical components in addition to the site effects. The characterized source model consists of by 2 principal strong-motion-generation-areas (SMGAs). This ground motion simulation approach, applicable to any arbitrary seismic source model, is well suited for seismic hazard analysis and ground motion simulation. The results of the synthetic accelerograms fit well the spectral and temporal domains of the real records. AGRADECIMIENTOS Recognition of the Conicyt scholarship for financing this doctoral project. REFERENCIAS Otarola, C., and Ruiz, S. (2016). Stochastic generation of accelerograms for subduction earthquakes. Bulletin of the Seismological Society of America , 106(6), 2511-2520. C I E NC I A S D E L A T I E R R A 03