Fire is a minor earthquake disaster, but the extent of the harm is greater than sometimes ground shaking. Vibrate so stove, gas stove shift, so that the gas pipe rupture, breaking loose wires so as to make fire, and vibrated at the same time cut off the water, so water can not fire. In the 1906 San Francisco earthquake and the 1923 Kanto earthquake, more than 90% of buildings damaged by fire caused.