1605年琼山强地震导致的同震海岸快速下沉、可能紧随的海啸及其证据

根据琼州府志、琼山县志及一些家谱、族谱等的记载,再加上对海域中退潮后海底残留的房屋、坟墓等各种沉没于海的人类活动废墟和东寨港海域中地震地貌的发现与考察,结合本人和前人以往的研究成果,证实1605年7月13日海南岛琼山县发生的71/2级强地震导致琼州海峡东南侧与琼北陆地相连的海底及与海相连的琼北东部一些沿岸陆地大面积同震快速下沉,使得原先为陆地的东寨港、北创港和舖前港及其以北海域等地区大面积陆陷成海。这是一次生源地在与海相连的海岸带的同震海岸下沉。推断了这次地震海啸;比较了这次陆陷成海地震海啸与生源地在近海和大洋海底的地震海啸的异同;也与北美西海岸生源地在太平洋板块斜插在北美大陆板块之下形成消减带的海岸同震下沉及海啸比较了异同。最后还提出,琼州大地震陆陷成海灾害应从根本上区别通常所说的震陷灾害。

The Coseismic Coast Fast Sinkage and the Following Possible Tsunami Caused by the 1605Qiongshan Strong Earthquake and the Evidence

It is proved in this paper that the earthquake with magnitude 7.5 occurred in Qiongshan county of Hainan island on July 13,1605 made the sea floor in the southeast side of Qiongzhou strait which was linked with land of north Hainan and some coast land of the northeast of Hainan which was linked with the sea fast sink coseismically in a large scale and made a large-scale former land in Dongzhai bay,Puqian bay,Beichuang bay and their northern sea area sink into the sea,based on historical data,investigation and so on.It was a coseismic coast fast sinking event in which source land was in the coast linking to the sea.The seismic tsunami was also inferred.The similarities and the differences between this tsunami and the tsunami which source was in the floor of the offing and ocean,between this tsunami and the tsunami which source was in the Pacific plate are compared.It is finally indicated that the calamity of land sinking into the sea caused by Qiongzhou earthquake is thoroughly differed from that of the earthquake subsidence in general speaking.