Abstract
Epi-continental arc system is a series of arcuate structures along coastlines of the mainland and behind the island arc system on the margin of the Northwest peri-Pacific region. Epi-continental arc is similar to the island arc in geometery and kinematics, but it was characterised by an arcuate fracture zone and compensated front-sag, basic volcanic activity, shallow earthquake belt and the latest active tectonics. The eastern China continent is dominated by the coastal epi-continental arc of Southeast China. Its front arc is situated along the coastline of Zhejiang, Fujian and eastern Guangdong provinces which is convex to SE. The left NW-trending flank extended along the NW-trending coast line of northern Jiangsu and traversed Shangdong Peninsula to northern Hebei and Shanxi provinces; and the right E-W trending flank along the western Guangdong, southern Guangxi, northern Hainan coastlines extended to northern Hanoi. This arc controlls activities of the most modern intense earthquakes in eastern China continents. The compressing thrust-type earthquakes occurred along the front arc, especially the “collison belt”, and the strike-slip-type earthquakes along the both flanks sinistral and dextral strike-slip faults respectively. Earthquakes of epi-continental arc type is characterised by segmentation in space and periodicity in time.
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