Surface-wave eikonal tomography in a scattering environment
Name
paper9_Gouedard_surfacewave_2010.pdf
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174.65 KB
Format
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Checksum (MD5)
8ef00dc77c83926ba4d3e12e0804ae14
Author(s)
Verdel, Arie
Gouedard, Pierre
Yao, Huajian
van der Hilst, Robert D.
Date Issued
2010
Publisher
Massachusetts Institute of Technology. Earth Resources Laboratory
Series/Report no.
Earth Resources Laboratory Industry Consortia Annual Report;2010-09
Abstract
Surface waves are of increasing interest in seismic prospecting. Traveltime tomography based on
dispersion measurements is often used to process surface-wave data, but it has limitations due to the
a priori information it requires. The surface-wave eikonal tomography proposed here does not require
such a priori information. In complex scattering environments, picking arrivals is difficult because the
waveforms are complicated. Working in narrow frequency bands makes it even more difficult as it spreads
arrivals in time and introduces overlap. We present here a neighborhood-based cross-correlation picking
method that overcomes this difficulty, which then allows for reliable calculation of 2D phase-velocity
variation through the eikonal equation.
Subjects
Scattering
Tomography
Persistent DSpace Link
