What is the Useful Application of the Earthquake Early Warning System?

Abstract eng:
The early warning information is requires not to cause the social confusion and mislead especially for the public people and the important facilities but in these days some earthquake shows that it is hard to say the governmental information is successful. From the viewpoint of the practical or useful earthquake early warning system, it is very important to issue the warning quickly as possible and also to support the facility recovery if possible. This paper describes the basic ideas and examples of practical use of the useful application of the earthquake early warning system as follows. One is the portable P wave detection system for the rescue team and it can keep the safety of the rescue staffs with the P wave alarm independently from the network even in the focal area. Next is the rational train operation with the combination system of the P wave detection system and high density acceleration collectors. This system can stop train operation immediately by P wave and support the reoperation rationally by specification of checking zone with gathering observed acceleration in real-time. The last is the result of comparison between the network information and on-site information. As an example of the observation, the on-site system can issue the information five seconds before the S wave arrival and it was four seconds earlier than that of EEW by JMA. It shows the advantage and necessity of the on-site system especially for the important facility.

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