东南沿海地区中强震的深部构造标志研究

Study on the Mark of Deep Structure of Moderate-strong Earthquake along the Southeastern Coast of China

本文通过对江苏、上海、浙江、福建、江西、广东、海南等地区及东海,南海部分海域(总面积1441600km^2)的航磁资料反演得到的地壳磁结构及深部构造,找出了该研究区域内的中、强震的深部构造标志。在该区域中85％的中、强震发生在磁性块体边界上,发生在深断裂带上的中、强震概率为93％。同时还详细探讨了中、强震的发震构造条件,并以发震构造为依据探讨了未来不同震级的地震活动性。

In this paper the crustal magnetic structure and deep faulting structure were inversed by using aeromagnetic date obtained in Jiangsu, Shanghai, Zhejiang, Jiangxi, Fujian, Guangdong and Hainan Provinces and city as well as in part sea waters of the East China Sea and South China Sea (total area: 1441600km2). The mark of deep structure of moderate-strong earthquake was found, 85% of moderate-strong earthquake took place along the boundary of magnetic block and 93% of moderate-strong earthquake occurred along deep fault zone. The structure condition for occurrence of moderate-strong earthquake was studied in detail and 66 potential source areas were found in this region.