International Conference on Soil Liquefaction, November 3-4, 2003. Estimation of Strong Motion Response Spectra from Weak Motion Data for Earthquakes in Taiwan Yi-Ben Tsai 1 and Hsiao-Ling Chao 2. 1. Institute of Geophysics, National Central University, Chung-Li, Taiwan
Estimation of Strong Motion Response Spectra from Weak Motion Data for Earthquakes in Taiwan
Yi-Ben Tsai1 and Hsiao-Ling Chao2
1. Institute of Geophysics, National Central University, Chung-Li, Taiwan
2. Seismology Center, Central Weather Bureau, Taipei, Taiwan
Two seismic strong motion networks in Taiwan
＊ 80-station real-time network for rapid reporting.
＊ 650-station free-field network for dense coverage.
Highly repeatable local site response of ground motion
＊ Moderate earthquakes up to M5.8.
＊ Large Chi-Chi aftershocks up to M6.5.
Testing results from M7.6 Chi-Chi earthquake data
＊ Very reliable for distant stations.
＊ Reliable for near-source stations with some exceptions.
＊ Combination of the two networks can provide rapid and reliable estimation of strong ground motion response spectra.
Purpose: 2003To make use of two excellent strong-motion networks for rapid mapping of dense strong-motion distributions.
For timeliness:Taiwan Rapid Earthquake Information Release System.
For dense coverage:Taiwan Strong Motion Instrumentation Program Network .
Data analyzed:Chi-Chi earthquake,M7.6,396 stations.
6 Chi-Chi aftershocks ,M6.3-6.5,331-375 stations.
Chiayi earthquake, M5.8,336 stations.
Rayli earthquake, M5.7,231 stations.
* means the record in TREIRS station is replaced by the record in free-field station.
Combination of the two seismic networks can provide rapid and reliable estimation of strong ground motion response spectra for earthquakes in Taiwan.