城市及邻近地区地震活断层引起的直下型地震，将会给大城市造成巨大的地震灾害。
Earthquakes provoked by active faults directly beneath the metropolises can cause serious disasters to the cities.
本文对城市直下型地震进行了初步探讨。列举了被认为是城市直下型地震的典型震例；
The paper makes a preliminary approach to right-beneath-city type earthquakes, citing some typical cases which are considered as right-beneath-city type earthquakes;
分析结果表明，对于较为普遍的主要受直下型地震和近震潜源影响的地区，在长周期部分，一致概率谱总体小于规范谱。
The results show that in the most areas influenced mainly by the potential sources of the epicentral earthquakes and the regional earthquakes, PCS is generally lower than CDS in the long periods.
应用推荐