TSUNAMI HAZARD DATASET IN THE SOUTH CHINA SEA

The South China Sea and surrounding coastal regions are at risk of earthquakes and tsunamis from the Manila Trench, which is the junction of the Philippine Sea plate and the Sunda plate. In order to reduce the impact of tsunami hazard in the South China Sea, tsunami hazard assessment is necessary, with the probabilistic tsunami hazard assessment (PTHA) being the main focus in recent years. In the entire process of probabilistic tsunami hazard assessment, there are varying degrees of uncertainty. The largest source of uncertainty is the seismic activity including the maximum possible magnitude and rupture characteristics. With the rapid development of Global Navigation Satellite System (GNSS), the method of using surface GPS horizontal velocity field data to invert fault coupling and slip deficit has been widely used. The distribution of coupling and slip deficit can be used to estimate the seismic potential and describe the characteristics of slip distribution in an earthquake. The study aims to clarify the spatial distribution of tsunami hazard in the South China Sea through the PTHA considering geodetic coupling. The effects of different heterogeneous slip distributions on PTHA results are investigated.