Abstract:
The purpose of this study is to analyze the seismic hazard in Thailand with the concept of probability. In the present study, the seismicity was collected and the seismic source zones in Thailand and adjacent area, including the Sumatra-Andaman subduction zone were considered. The appropriate strong ground motion attenuation models were used to estimate ground motion intensity by the application of a logic tree approach. The probabilistic seismic hazard map is presented in terms of peak ground acceleration and spectral acceleration at 0.2, 1.0, and 2.0 second periods for 10% and 2% probabilities of exceedance in 50 years. The expected peak ground accelerations are 0.37g at 10% and 0.52g at 2% in 50-year level. For the spectral accelerations at 0.2 second periods with 10% and 2% probabilities of exceedance in 50 years, the estimated values are about 0.87g and 1.21g, respectively.