Frontier Research

Project Title: 

NCHC's “Frontier Research in 3D Wavefield Simulation and Inversion in Complex Structure Area” Project

Contact: 

Dr. How-Wei Chen; hwchen@ncu.edu.tw

Project Website: 

http://140.115.21.198/csvr/modules/tinyd01/index.php?id=4

 

Project Overview:

The research group is a multi-purpose research program using unified approach for source rupture, seismic wave propagation and crustal structure imaging through full waveform simulation and inversion. Broadband and strong motion passive source data from BATS and TSMIP earthquake monitoring networks are the major data resources to study large earthquakes occurred in Taiwan. In addition, we also focus on imaging tectonic frameworks beneath Taiwan where arc-continent collision between Philippine Sea Plate (PSP) and Eurasian Plate (EUP) are occurring beneath Taiwan. The onshore and offshore wide-angle seismic data collected from both TAICRUST (1995) and TAIGER (2006-2009) Taiwan-US international project for imaging deep crustal structure is the ongoing project.

 

Project Results:

Practical applications include: (1) To explore the spatial and temporal rupture processes when large earthquake occurred. (2) To investigate source, path and site responses including topography effects, amplification due to effects of shallow soil/sedimentary layers, basin shape, lateral velocity variation, Q distribution and other physical parameters. (3) To image three-dimensional heterogeneous earth structure through pre-stack imaging using dataset collected from both onshore (dynamite) and offshore (MCS/OBS) wide-angle seismic profiles. (4) To perform receiver function study to explore depth variation of Conrad and Moho discontinuity beneath Taiwan island. (5) To investigate the attenuation effects on seismic amplitude affected by propagation distance and frequency, scattering and the feasibility of apply reverse-time wavefield extrapolation in seismic simulation and inversion.