Abstract: An earthquake occurred in the study area in 1605,with a magnitude of 7.5,which caused the continental collapse to have formed the sea.For this area the seismicity is characteristic of 1)clustering in the north and south of the Hainan Island;2)migrating south-north;and 3)a definite seismic period.These kinds of formed characteristics may be related to the crustal isostatic disequilibrium responding to the uplifting of this island in the process of being deformed between the Eastern Asian continent that spreaded south and the South China Sea that was compressing as it opened.

摘要： 南岛1605年曾发生过7 ¹/₂级强震,是一个有研究意义的地震活动区。海南岛地震活动有三个较显著的特征:集中分布于南北二个狭窄区域、具南北迁移现象和存在一定的活动周期和平静期。其特征的形成与海南隆起受东亚大陆向南推压和南海扩张向北推压所引起的地壳不均衡运动有关。