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广州是祖国的南大门,是华南地区陆、海、空交通运输枢纽和经济中心,亦是我国对外交往和贸易的重要口岸。历史上广州地区虽然没有大于六度破坏性地震的记载,但在整个珠江三角洲地区已有10次4—5级较强地震的发生(图1)。为探测这一地区地震活动的趋势,本文根据过去工作的成果,补充近年取得的一些工作资料,对蕴震构造及其活动性作了粗略的综合分析,并进一步讨论了地震发展的趋势。
As the southern gateway to the motherland, Guangzhou is a hub, an economic hub for land, sea and air transport in southern China. It is also an important port for China’s foreign affairs and trade. Although there are no records of more than six degrees of destructive earthquakes in Guangzhou in history, 10 strong earthquakes of magnitude 4-5 occurred in the entire Pearl River Delta (Figure 1). In order to detect the trend of seismic activity in this area, based on the results of past work, this paper supplements some working materials obtained in recent years to make a rough and comprehensive analysis of the sedimentary structure and its activity, and further discusses the trend of earthquake development.