Abstract
A real-time tsunami hazard mapping system has been developed to estimate tsunami inundation before tsunami arrival afther earthquake occurfrence in order to support disaster preventive activities before tsunami arrival such as evacuation guiding and closing of land lockes, and emergency responses for relief and restoration after disaster occurrence. This system uses tsunami waveform data measured offshore to estimate a tsunami source which is emplyed to calculate tsunami propagation and inundation. Developing a pototype of the system and applying it to Nagoya port hit by a tsunami generated by an expected megathroust earthquake along Nankai trough, it confirmed that the system can produce inundation estimation in Nagoya port within 8 minutes after the earthquake ooccurrence. Using a graphic processing unit, it takes totally 80 seconds to estimate a tsunami source based on tsunami waveforms measured by 8 offshore GPS-mounted bouys and calculate tsunami propagation and inundation from the tsunami source.
