Abstract -- Central Weather Bureau (CWB) of the R.O.C. has installed more than 650 seismograph stations all over Taiwan to collect ground motion data. The intense and the frequency content of ground motion are affected by the source of earthquake, propagation path of stress waves and the site conditions. Bedrock motion, the motion that occurs at bedrock overlain by soil deposit, can be predicted by empirical attenuation relationships, but the surface ground motion is influenced by the soils that lie above the bedrock. Realizing soil conditions of the station site becomes an essential task for earthquake engineering.
This project was established by CWB and NCREE in 2000. The central component of this project is the collection and dissemination of high quality subsurface data obtained from seismograph station sites. Soil profile characteristics are determined by subsurface investigation and field/lab testing program. The project use Suspension P-S Velocity Logging System to survey the layer wave velocity. All the results are organized into a GIS web, and the application will be more convenient.