2D full-waveform modeling of seismic waves in layered karstic media
Name
Zheng-2016-2D full-waveform.pdf
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3.08 MB
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Checksum (MD5)
0bc827c2370bf19e13b9276c9bb348f8
Author(s)
Malallah, Adel H.
Hu, Hao
Zheng, Yingcai
Fehler, Michael
Date Issued
March 2016
Journal
Geophysics
Publisher
Society of Exploration Geophysicists
Citation
Zheng, Yingcai, Adel H. Malallah, Michael C. Fehler, and Hao Hu. “2D Full-Waveform Modeling of Seismic Waves in Layered Karstic Media.” GEOPHYSICS 81, no. 2 (March 2016): T115–T124. © 2016 Society of Exploration Geophysicists
Version
Final published version
Abstract
We have developed a new propagator-matrix scheme to simulate seismic-wave propagation and scattering in a multilayered medium containing karstic voids. The propagator matrices can be found using the boundary element method. The model can have irregular boundaries, including arbitrary free-surface topography. Any number of karsts can be included in the model, and each karst can be of arbitrary geometric shape. We have used the Burton-Miller formulation to tackle the numerical instability caused by the fictitious resonance due to the finite size of a karstic void. Our method was implemented in the frequency-space domain, so frequency-dependent Q can be readily incorporated. We have validated our calculation by comparing it with the analytical solution for a cylindrical void and to the spectral element method for a more complex model. This new modeling capability is useful in many important applications in seismic inverse theory, such as imaging karsts, caves, sinkholes, and clandestine tunnels.
MIT Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1190/GEO2015-0307.1
