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

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

Jun 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000sci...288.2346k&link_type=abstract

Science, Volume 288, Issue 5475, pp. 2346-2349 (2000).

Physics

58

Scientific paper

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.

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