前言如能切实做到地震预报,就可极大地减轻地震灾害。但就现状而言,高度准确的地震预报是做不到的,而且也难以预料近期内能否实现。然而,作为尽量减轻地震灾害的比较好的措施——日本国铁的地震速测系统,以东北新干线为具体对象,早已开展了研究工作。一般认为,该系统不仅适用于新干线,对城市各类设施和工业设施,也能广泛地发挥作用。现就 Preface Earthquake damage can be greatly mitigated if earthquakes are effectively predicted. However, as far as the status quo is concerned, highly accurate earthquake prediction can not be done and it is hard to predict whether it will be realized in the near future. However, as a comparatively good measure to minimize the earthquake disaster, the Japan National Railway seismic velocity measurement system, with the northeastern Shinkansen as a specific object, has carried out research work. It is generally accepted that the system can be applied not only to the Shinkansen but also to a wide range of facilities and industrial facilities in the city. Now