HR: 1340h
AN: T43A-1369    [Abstracts]
TI: Constructing a Teleseismic Tomographic Image of Taiwan using BATS Recordings
AU: * Krajewski, J
EM: krajej@rpi.edu
AF: Rensselaer Polytechnic Institute, 110 Eighth St, Troy, NY 12180 United States
AU: Roecker, S
EM: roecks@rpi.edu
AF: Rensselaer Polytechnic Institute, 110 Eighth St, Troy, NY 12180 United States
AB: Taiwan is an evolving arc-continent collision located at a complicated part of the plate boundary between the Eurasian and Philippine Sea plates. To better understand the role of the upper mantle in the dynamics of this collision, we reviewed 4 years of data from the Broadband Array in Taiwan for Seismology (BATS) in Taiwan to construct a teleseismic dataset for tomographic imaging of the subsurface of the island. From an initial selection of approximately 300 events, we used waveform correlation to generate a dataset of 4500 relative arrival times. To calculate accurate travel times in three dimensional wavespeed models over the large lateral distances in our model (~800 km), we solve the eikonal equation directly in a spherical coordinate system. We reduce the influence of smearing of crustal heterogeneity into the deeper mantle, we fix the upper 30 km to a previously determined P wavespeed model for the region. Initial resolution tests suggest a spatial limit on the order of 40 km.
DE: 7218 Lithosphere (1236)
DE: 7270 Tomography (6982, 8180)
DE: 8108 Continental tectonics: compressional
SC: Tectonophysics [T]
MN: Fall Meeting 2005