Taiwan located at circum-Pacific seismic belt and the junction of the Eurasian plate and Philippine Sea plate. In average, more than 4000 earthquakes occurred annually. However, with today's science and technology, the earthquake is still unable to estimate and evacuate the people in advance. But we can take advantage of the characteristics of seismic waves propagation, applying the Earthquake Early Warning System (EEWS) to detect the first-coming P-wave and predict the intensity of the following S-wave, raise alarm and disaster prevention control before the main shake. With the global economic development, the earthquake threat to us not only the lives near the epicenter, but will endanger the whole country and even the world 's economic development. If we can make an effective earthquake early warning and disaster prevention -related applications, and the threat of an earthquake can be significantly reduced, even more we can bring out the industry of disaster prevention. NCREE has developed the on-site Earthquake Early Warning System (EEWS) , which only used the signal from the on-site sensor, the calculation time was less and suitable to provide earthquake early warning to the region which close to the epicenter. Through the shaking table tests in the laboratory and five years field tests on the demonstration sites, the proposed on-site EEWS has shown that it can provide the early warning before the main shake. With the application of automatically warning broadcasting and disaster prevention control, the seismic loss can be greatly reduced. In the next four years, NCREE will help to install the EEWS on 3,344 schools in Taiwan. In the same time, more application cases on office buildings and high-tech fab will be done.
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