Investigating Crustal Structure in Western Taiwan Integrated from Seismic Tomography, Shallow Seismic Reflection, and Insar Data(1/3)

Project Details

Description

Damaged earthquakes have occurred frequently in western Taiwan and several active fault zones are responsible for that. In this region, those fault zones can be grouped into two systems based on two tectonic stages that Taiwan has been through: the normal fault system by the rifted continental margin and the fold-and-thrust belts by mountain building process. Due to the interaction between these two fault systems, the geometries of fault zones are complicated and many are blind faults. In the past two years, my research team has successfully deployed two dense seismic arrays to look for the subsurface structures. Based on this we proposal a four-year research proposal to carry out dense seismic array deployments, shallow seismic reflections, and InSAR data in western Taiwan to have comprehensive results of the subsurface images and surface deformation. For the field experiments, we will deploy 6 seismic arrays and each array has 74 stations (5-6 km station spacing) and records continuously for 3 months to cover the whole western Taiwan in 3 years. Also, we will do shallow seismic reflections in Yichu and Hishua fault zones and each fault has two 4-km long profiles to investigate the fault zone structures. We also will process InSAR data to look for how the crustal structure from seismic surveys related to the surface deformation in western Taiwan. The shallow shear wave velocity, one of the results obtained from dense seismic arrays is important for the peak ground motion simulation for earthquake engineering.
StatusFinished
Effective start/end date1/08/1831/07/19

UN Sustainable Development Goals

In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This project contributes towards the following SDG(s):

  • SDG 11 - Sustainable Cities and Communities
  • SDG 17 - Partnerships for the Goals

Keywords

  • Blind fault
  • Yichu fault
  • Hisnhua fault
  • dense seismic array
  • shallow seismic reflection
  • Differential Interferometric Synthetic Aperture Radar
  • shallow shear wave velocity structure

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