Please use this identifier to cite or link to this item:
|Scopus||Web of Science®||Altmetric|
|Title:||Fast and accurate global multiphase arrival tracking: the irregular shortest-path method in a 3-D spherical earth model|
|Citation:||Geophysical Journal International, 2013; 194(3):1878-1892|
|Publisher:||Oxford University Press|
|Guo-Jiao Huang, Chao-Ying Bai and Stewart Greenhalgh|
|Abstract:||The traditional grid/cell-based wavefront expansion algorithms, such as the shortest path algorithm, can only find the first arrivals or multiply reflected (or mode converted) waves transmitted from subsurface interfaces, but cannot calculate the other later reflections/conversions having a minimax time path. In order to overcome the above limitations, we introduce the concept of a stationary minimax time path of Fermat's Principle into the multistage irregular shortest path method. Here we extend it from Cartesian coordinates for a flat earth model to global ray tracing of multiple phases in a 3-D complex spherical earth model. The ray tracing results for 49 different kinds of crustal, mantle and core phases show that the maximum absolute traveltime error is less than 0.12 s and the average absolute traveltime error is within 0.09 s when compared with the AK135 theoretical traveltime tables for a 1-D reference model. Numerical tests in terms of computational accuracy and CPU time consumption indicate that the new scheme is an accurate, efficient and a practical way to perform 3-D multiphase arrival tracking in regional or global traveltime tomography.|
|Keywords:||Seismic tomography; Computational seismology; Wave propagation|
|Rights:||© The Authors 2013|
|Appears in Collections:||Aurora harvest 7|
Geology & Geophysics publications
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.