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Huang et al. 2000
Huang, B., Chen, K., Huang, W., Wang, J., Chang, T., Hwang, R., Chiu, H. and Tsai, C.P. (2000). Characteristics of strong ground motion across a thrust fault tip from the September 21, 1999, Chi-Chi, Taiwan earthquake. Geophysical Research Letters 27: doi: 10.1029/2000GL011396. issn: 0094-8276.

Near fault tip strong motion records from the northern part of the major earthquake (Mw=7.6), namely the Chi-Chi earthquake on September 21, 1999 in central Taiwan demonstrated systematic differences on the hanging wall and footwall, and simulated by the finite element method. The extraordinary ground motion differences on either side of the northern fault tip can be explained by a 2-dimension kinematic source model with fault rupture breaking to surface. In this study, the earthquake faulting was considered as bilateral from the center of a low angle thrust fault which is 30 km in length with a dip angle of 31¿. Based on waveform modeling, the source rupture velocity, rise-time and dislocation of 2.0 km/sec, 5 sec and 6 meters, respectively are suggested. The results of this study show that on the northern part of the Chi-Chi earthquake fault there was lower rupture velocity and longer rise-time of the fault slip than that previously reported. Furthermore, the effects of surface breaking from the fault movement contributed large ground deformations near the fault tip and, consequently, induced extensive damage. ¿ 2000 American Geophysical Union

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Abstract

Keywords
Seismology, Seismology, Earthquake dynamics and mechanics, Seismology, Earthquake ground motions and engineering, Seismology, Earthquake parameters
Journal
Geophysical Research Letters
http://www.agu.org/journals/gl/
Publisher
American Geophysical Union
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