012_2003_Wu_et_al_BSSA_Intensity 1

012_2003_Wu_et_al_BSSA_Intensity 1 - Bulletin of the...

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386 Bulletin of the Seismological Society of America, Vol. 93, No. 1, pp. 386–396, February 2003 Relationship between Peak Ground Acceleration, Peak Ground Velocity, and Intensity in Taiwan by Yih-Min Wu, Ta-liang Teng, Tzay-Chyn Shin, and Nai-Chi Hsiao Abstract Based on the strong-motion data set from the 1999 Chi-Chi, Taiwan, earthquake and a shaking damage statistics database, we investigated the correlations between strong ground motions and earthquake damage (fatalities and building col- lapses) through a regression analysis. As a result, the current earthquake intensity scale I t is placed on a more reliable instrumental basis. This is necessary for the real- time seismic monitoring operation in Taiwan where programs for earthquake rapid reporting ( RRS ) and earthquake early warning ( EWS ) are actively pursued. It is found that the earthquake damage statistics give a much closer correlation with the peak ground velocity ( PGV ) than with the peak ground acceleration ( PGA ). The empirical relationship between PGV
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