Variable Grid Finite-Difference Modeling Including Surface Topography
We have developed a two-dimensional viscoelastic finite-difference modeling method for highly complex topography. Realistic modeling of seismic wave propagation in the near surface is complicated by many factors, such as strong heterogeneity, topographic relief and large attenuation. In order to...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Technical Report |
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Massachusetts Institute of Technology. Earth Resources Laboratory
2012
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| Online Access: | http://hdl.handle.net/1721.1/75434 |
| _version_ | 1826218164185202688 |
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| author | Hayashi, Koichi Burns, Daniel R. |
| author2 | Massachusetts Institute of Technology. Earth Resources Laboratory |
| author_facet | Massachusetts Institute of Technology. Earth Resources Laboratory Hayashi, Koichi Burns, Daniel R. |
| author_sort | Hayashi, Koichi |
| collection | MIT |
| description | We have developed a two-dimensional viscoelastic finite-difference modeling method
for highly complex topography. Realistic modeling of seismic wave propagation in the
near surface is complicated by many factors, such as strong heterogeneity, topographic
relief and large attenuation. In order to account for these complications, we use a
velocity-stress staggered grid and employ an 0(2,4) accurate viscoelastic finite-difference scheme. The implementation includes an irregular free surface condition for topographic relief and a variable grid technique in the shallow parts of the model. Numerical tests indicate that approximately ten grid-points per shortest wavelength results in accurate calculations. The method is accurate and stable, and allows us to handle complex structure in finite-difference modeling. |
| first_indexed | 2024-09-23T17:15:31Z |
| format | Technical Report |
| id | mit-1721.1/75434 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T17:15:31Z |
| publishDate | 2012 |
| publisher | Massachusetts Institute of Technology. Earth Resources Laboratory |
| record_format | dspace |
| spelling | mit-1721.1/754342019-04-10T23:57:03Z Variable Grid Finite-Difference Modeling Including Surface Topography Hayashi, Koichi Burns, Daniel R. Massachusetts Institute of Technology. Earth Resources Laboratory Burns, Daniel R. We have developed a two-dimensional viscoelastic finite-difference modeling method for highly complex topography. Realistic modeling of seismic wave propagation in the near surface is complicated by many factors, such as strong heterogeneity, topographic relief and large attenuation. In order to account for these complications, we use a velocity-stress staggered grid and employ an 0(2,4) accurate viscoelastic finite-difference scheme. The implementation includes an irregular free surface condition for topographic relief and a variable grid technique in the shallow parts of the model. Numerical tests indicate that approximately ten grid-points per shortest wavelength results in accurate calculations. The method is accurate and stable, and allows us to handle complex structure in finite-difference modeling. Massachusetts Institute of Technology. Borehole Acoustics and Logging Consortium Massachusetts Institute of Technology. Earth Resources Laboratory. Reservoir Delineation Consortium United States. Dept. of Energy (Grant DE-FG02-98ER14846) 2012-12-12T19:38:24Z 2012-12-12T19:38:24Z 1999 Technical Report http://hdl.handle.net/1721.1/75434 Earth Resources Laboratory Industry Consortia Annual Report;1999-16 application/pdf Massachusetts Institute of Technology. Earth Resources Laboratory |
| spellingShingle | Hayashi, Koichi Burns, Daniel R. Variable Grid Finite-Difference Modeling Including Surface Topography |
| title | Variable Grid Finite-Difference Modeling Including Surface Topography |
| title_full | Variable Grid Finite-Difference Modeling Including Surface Topography |
| title_fullStr | Variable Grid Finite-Difference Modeling Including Surface Topography |
| title_full_unstemmed | Variable Grid Finite-Difference Modeling Including Surface Topography |
| title_short | Variable Grid Finite-Difference Modeling Including Surface Topography |
| title_sort | variable grid finite difference modeling including surface topography |
| url | http://hdl.handle.net/1721.1/75434 |
| work_keys_str_mv | AT hayashikoichi variablegridfinitedifferencemodelingincludingsurfacetopography AT burnsdanielr variablegridfinitedifferencemodelingincludingsurfacetopography |