The fault zone passes through the offshore between the Changdong islands and the Dazhudao island, and consists of a group of NW trending faults, which are dominated by normal and reverse slips with strike-slip component.

• 该断裂带由一系列北西走向的次级断层组成，主体在长岛至大竹岛之间的海域，多数断层以正断兼有走滑运动为主，部分断层具有逆冲运动性质。