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Yih-Min Wu Dept. of Geosciences National Taiwan University

3D Vp/Vs tomography and earthquake relocation in Taiwan using S-P times from a dense network of strong-motion stations. Yih-Min Wu Dept. of Geosciences National Taiwan University. Thanks to. Chien-Hsin Chang (CWB, Taiwan) Li Zhao (IESAS, Taiwan) J. Bruce H. Shyu, Yue-Gau Chen (NTU, Taiwan)

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Yih-Min Wu Dept. of Geosciences National Taiwan University

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  1. 3D Vp/Vs tomography and earthquake relocation in Taiwan using S-P times from a dense network of strong-motion stations Yih-Min Wu Dept. of Geosciences National Taiwan University

  2. Thanks to • Chien-Hsin Chang (CWB, Taiwan) • Li Zhao (IESAS, Taiwan) • J. Bruce H. Shyu, Yue-Gau Chen (NTU, Taiwan) • Kerry Sieh, Jean-Philippe Avouac (Caltech)

  3. TSMIP S-P

  4. Vp & VpVs tomography • Inversion method and computer algorithms (SIMULPS12) by Thurber and Eberhart-Phillips. • The selected data set consists of 299,104 P arrivals and 174,203 measurements of the S-P time differences from 17,206 local earthquakes. • 3-D grid of points 28x32x17.

  5. Damping Vp 35 Vp/Vs 40

  6. Resolution Test

  7. Vp & Vp/Vs results

  8. Kim et al. (2005) Vp&Vp/Vs This Study Vp & Vp/Vs

  9. Relocation examination • 35,530 events of M>3 from 1990 to 2006 for 3D relocation.

  10. Conclusions • S-P readings from TSMIP can greatly improve earthquakes observation in Taiwan. • In the future, waveform tomography using the TSMIP records will be applied for offering detail fine Vp and Vp/Vs structures.

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