Abstract — Integrated simulation systems are important tools to decrease the damage caused by various disasters. In peacetime, it would be used for disaster-proof city planning, disaster prevention plans, and disaster response training. At the time of a disaster occurs, it will be used for real-time simulation to predict disasters. The paper describes the simulation system that has the following features: (1) integration of sub-simulators, such as a seismic intensity simulator, fire and its extinguishment simulators, and so on, (2) support for different time scales of sub-simulators, and (3) scalability for the size of the simulated world. The paper also describes the performance of the system on a 34 PC cluster. I
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