Abstract
Immediate casting technology of earthquake motion has been becoming possible by development of information technology. This paper describes the effectiveness of active disaster prevention system using immediate casting information of earthquake motion. This system consists of high density seismological observation network in certain focused area. This system makes possible to expect the earthquake motion by using time lags between transmission speed of information and propagating speed of earthquake. This observation network system was actually constructed in the utility tunnel of University of Tsukuba and earthquake motion observation was carried out. The anti-resonance control for the variable stiffness structure is simulated using the observed acceleration data. The effectiveness of this disaster prevention system is recognized.
