News
<<2020.05>>
The data of investigated stations in 2016 and 2018 were added.
2016¡GMTN167
2018¡GCHY115¡BTAP055
<<2018.06.27>>
The site database has a significant update in order to meet the demand of the SSHAC Level 3 project (http://sshac.ncree.org.tw/) in Taiwan. The site database now provides site parameters, i.e. Vs30, Z1.0, and £e 0 for 816 TSMIP stations in Taiwan. The technical report in Chinese has been published ( NCREE-17-004 ). The English report and journal paper are under preparation. The significant updates include:
1. Use more velocity loggings (provided by IES and Taipower company)
2. Adopted estimated Vs30 (proxy-based: Kwok et al. 2018 and receiver function: Lin et al. 2014; 2016)
3. Add depth parameter Z1.0. (derived from microtemor array, velocity logging, receiver function, or microtremor HVSR)
4. Add high-frequency attenuation parameter £e 0 . (The paper is under preparation)
The latest distributions of Vs30, Z1.0, and £e0 in all of Taiwan. (from site database v7.5)
References:
Kuo, C. H., K. L. Wen, H. H. Hsieh, C. M. Lin, T. M. Chang, and K. W. Kuo (2012). Site Classification and Vs30 estimation of free-field TSMIP stations using the logging data of EGDT. Engineering Geology , 129-130 , 68-75. DOI: 10.1016/j.enggeo.2012.01.013
Lin, C. M., K. L. Wen, C. H. Kuo, and C. Y. Lin (2014). S-Wave Velcity Model of Taipei Basin. The 5th Asia Conference on Earthquake Engineering (5ACEE) , Taipei, Taiwan, Oct. 16-18.
Kuo, C. H., K. L. Wen, C. M. Lin , S. Wen, and J. Y. Huang (2015). Investigating Near Surface S-wave Velocity Properties Using Ambient Noise in Southwestern Taiwan. Terrestrial, Atmospheric and Oceanic Sciences , 26 (2), 205-211.
Lin, C. M., K. L. Wen, C. Y. Lin, and C. H. Kuo (2016). Receiver Function Analysis of Strong-motion Stations in Kaohsiung-Pingtung Area, Taiwan. EGU General Assembly 2016 , Vienna, Austria, Apr. 17-22. (Abstract)
Kuo, C. H., C. T. Chen, C. M. Lin, K. L. Wen, J. Y. Huang, and S. C. Chang (2016). S-Wave Velocity Structure and Site Effect Parameters Derived by Microtremor Arrays in the Western Plain of Taiwan. Journal of Asian Earth Sciences , 128 , 27-41.
Kwok, O. L. A., J. P. Stewart, D. Y. Kwak, and P. L. Sun (2018). Taiwan-Specific Model for V S30 Prediction Considering Between-Proxy Correlation. Earthquake Spectra . (Publish online)
Kuo, C. H., C. M. Lin, S. C. Chang, K. L. Wen, and H. H. Hsieh (2017). Site Database for Taiwan Strong Motion Stations. Technical Report of NCREE, NCREE-17-004, 80pp. (In Chinese)
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<<2016.08>>
The Vs30 and Z1.0 information is shown in Station List.
Vs30: Average S-wave velocity of the top 30 meters. (Unit is usually in m/s)
Z1.0: Depth to the S-wave velocity horizons of equal and larger than 1.0 km/s. (Unit is usually in m)
Reference¡G
Vs30
Kuo, C. H., K. L. Wen, H. H. Hsieh, C. M. Lin, T. M. Chang, and K. W. Kuo (2012). Site Classification and Vs30 estimation of free-field TSMIP stations using the logging data of EGDT, Engineering Geology , 129-130 , 68-75. DOI: 10.1016/j.enggeo.2012.01.013
Kuo, C. H., C. M. Lin, K. L. Wen, and H. H. Hsieh (2016). An Important Update for the Engineering Geological Database for TSMIP , Short Report of NCREE .
Z1.0
Lin C. M., T. M. Chang, K. L. Wen, Y. C. Huang, H. J. Chiang, and C. H. Kuo (2009). Shallow S-wave Velocity Structures in the Western Coastal Plain of Taiwan, Terr. Atmos. Ocean Sci. , 20, 2, 299-308. doi: 10.3319/TAO.2007.12.10.01(T)
Lin, C. M., K. L. Wen, C. H. Kuo, and C. Y. Lin (2014). S-Wave Velcity Model of Taipei Basin, The 5th Asia Conference on Earthquake Engineering (5ACEE) , Taipei, Taiwan, Oct. 16-18.
Lin, C. M., K. L. Wen, C. Y. Lin, and C. H. Kuo (2016). Receiver Function Analysis of Strong-motion Stations in Kaohsiung-Pingtung Area, Taiwan, EGU General Assembly 2016, Vienna, Austria, Apr. 17-22. (Abstract)
Kuo, C. H., C. T. Chen, C. M. Lin, K. L. Wen, J. Y. Huang, and S. C. Chang (2016). S-Wave Velocity Structure and Site Effect Parameters Derived by Microtremor Arrays in the Western Plain of Taiwan, Journal of Asian Earth Sciences , 128 , 27-41. doi:10.1016/j.jseaes.2016.07.012
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<<2012.01>>
The related studies in Chinese ( NCREE-11-022 ) and English (Kuo et al. 2012) of the database were published, which includes the introduction of the drilling project as well as our research using the data. The Vs30 values and site classifications of 447 free field TSMIP stations was involved, as sketched in Fig. 1.
Fig. 1. The latest site classification.
Several researches adopted measured Vs30 at parts of the stations and then estimated Vs30 at other stations (Chiou et al., 2008; Lee and Tsai, 2008; Allen and Wald, 2009). We therefore compared the later measured Vs30 and the estimated Vs 30 in Fig. 2, which demonstrates the accuracy of estimated Vs30 by the three researches needs further advance.
Fig. 2. (a) Estimated and logged Vs30 at stations.
Fig. 2. (b) Bias of the estimated Vs30.
Related Researches
Kuo, C. H., K. L. Wen, H. H. Hsieh, T. M. Chang, C. M. Lin, and C. T. Chen (2011). Evaluating empirical regression equations for Vs and estimating Vs 30 in northeastern Taiwan . Soil Dynamics and Earthquake Engineering . 31 (3), 431-439. DOI: 10.1016/j.soildyn.2010.09.012
Kuo, C. H., K. L. Wen, H. H. Hsieh, C. M. Lin, and T. M. Chang (2011). Characteristics of Near-Surface S-wave Velocity. National Center for Research on Earthquake Engineering, NCREE-11-022, 82 pp. (In Chinese)
Kuo, C. H., K. L. Wen, H. H. Hsieh, C. M. Lin, T. M. Chang, and K. W. Kuo (2012). Site Classification and Vs30 estimation of free-field TSMIP stations using the logging data of EGDT. Engineering Geology . 129-130 , 68-75. DOI: 10.1016/j.enggeo.2012.01.013