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香港地区(包括香港、九龙和新界)是华南大陆莲花山构造带的南延部分,区内的主要断裂和褶皱以北东走向占优势。中生代的燕山运动形成了约占面积90％的各类花岗岩和火成岩。新构造运动期间,香港地区表现为间歇性的升降运动,发育有多级侵蚀面。第三系吉澳组地层中,发育有走向分别为82°和310°的共轭断裂,这是香港地区最新的活动断层。香港的地震观测记录始于1921年。现有四个地震台装有短周期地震仪,还有三处设有强震仪。1979年香港地方台网建立以来,只记录到三次有感地震,震级都是1.5级。1918年南澳地震、1962年河源地震和1969年阳江地震在香港的影响烈度分别为六一七度、五度和五度。从现有的资料和研究程度来看,还不能断言香港及其邻区是否属于地震危险区,而从地质构造背景分析,香港地区仍然不能算是地壳活动的相对稳定区,特别是新构造运动期间较大幅度的频繁的地壳升降所包含的不稳定因素,值得作为进一步监测地震活动的依据。
Hong Kong (including Hong Kong, Kowloon and the New Territories) is the southern extension of the Lianhuashan tectonic belt in the mainland of South China. The main faults and folds in the area are dominated by the NE direction. The Mesozoic Yanshan movement formed various types of granites and igneous rocks, accounting for about 90% of the area. During the new tectonic movement, Hong Kong showed intermittent movements and developed multi-level erosion surfaces. In the third member of the Kat O Formation, there are conjugate faults that are respectively 82 ° and 310 °, which is the latest active fault in Hong Kong. Seismological observations in Hong Kong began in 1921. The existing four seismological stations equipped with short-period seismographs, there are three strong seismographs. Since the foundation of Hong Kong’s local network in 1979, only three earthquakes have been recorded, with magnitudes of 1.5. The intensities of the 1918 South Australia Earthquake, the 1962 Heyuan Earthquake and the 1969 Yangjiang Earthquake in Hong Kong were respectively 6.17, 5.70 and 5.30. Judging from the existing information and research level, it is still not possible to assert that Hong Kong and its neighboring areas belong to the seismic hazard zone. However, from the geological structural background analysis, Hong Kong can not be regarded as a relatively stable part of crustal activity. In particular, during the Neotectonic Movement The more frequent and more frequent instability of crustal movements is worth to serve as a basis for further monitoring of seismic activity.