International conference on soil liquefaction november 3 4 2003
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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

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International Conference on Soil Liquefaction, November 3-4, 2003

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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 Tsai1 and Hsiao-Ling Chao2

1. Institute of Geophysics, National Central University, Chung-Li, Taiwan

2. Seismology Center, Central Weather Bureau, Taipei, Taiwan


Outlines of my presentation

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.

Conclusion

* Combination of the two networks can provide rapid and reliable estimation of strong ground motion response spectra.


Purpose:To 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.


Conclusion

Combination of the two seismic networks can provide rapid and reliable estimation of strong ground motion response spectra for earthquakes in Taiwan.


Thank you very much


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