Resumen
Chile is one of the most seismically active countries in the world, having witnessed several large earthquakes that produced human and material losses; seismic hazard estimation is one of the most used tools to prevent such losses. The present study reviews the state-of-the-art of the probabilistic seismíc hazard, comparing 3 different approaches and adapting them to central Chile. We include a series ofnew findings, such as the definition ofthe main seismogenic sources (interplate, interrnediate-depth intraplate, and crustal earthquakes ), new estimations of Gutenberg-Richter laws, and the use of specific attenuation laws for each one of them. Considering this information, we compute maps showing the expected peak ground horizontal acceleration (PGA), given a certain probabi1ity and time period where is observed not only the influence of interplate earthquakes, but also the effect of intermediate-depth intraplate and crustal earthquakes. For the Santiago Metropolitan area we obtain values for PGA of 55% g for a retum period of 475 years and 72% g for a retum period of 1950 years; only 13% lower than those observed on the coast (63% g and 83% g, respectively).