The Chi-Chi Earthquake Sequence: Active, Out-of-Sequence Thrust Faulting in Taiwan

+ See all authors and affiliations

Science  30 Jun 2000:
Vol. 288, Issue 5475, pp. 2346-2349
DOI: 10.1126/science.288.5475.2346

You are currently viewing the abstract.

View Full Text


We combined precise focal depths and fault plane solutions of more than 40 events from the 20 September 1999 Chi-Chi earthquake sequence with a synthesis of subsurface geology to show that the dominant structure for generating earthquakes in central Taiwan is a moderately dipping (20° to 30°) thrust fault away from the deformation front. A second, subparallel seismic zone lies about 15 kilometers below the main thrust. These seismic zones differ from previous models, indicating that both the basal decollement and relic normal faults are aseismic.

View Full Text

Related Content