关键词: 弧形带, 活动构造带, 地震活动性

Abstract: The central part of Taiwan area shows an arcuate thrust tectonics. Every arcuate belt is composed of a series of varying scales of sub arcs, which appear as a separate fold and thrust belt with independent characteristics of geometry, kinematics and mechanics and a self similar system as well. The kinematics of arc changes from thrusting on the top of the arc to the oblique thrusting and wrenching at the sections, and finally thrusts to the bottom of the arc. The arcuate thrust tectonics is composed of frontal, lateral and oblique ramps at depth. Each earthquake deformation belt is related to the independent arc. Strong earthquakes correspond to the large-scale arcs, and medium earthquakes to the small ones, and even to the smaller sub arcs. Finally, the mapping analysis is carried out between the contemporary seismicity and the space area of the arcuate thrusting tectonic system in the central part of Taiwan area, especially on strong Chi-Chi aftershock series.

Key words: arcuate zone, active tectonic zone, seismic activity, aftershock series