SVD enhanced seismic interferometry for traveltime estimates between microquakes
In general, Green’s functions obtained with seismic interferometry are only estimates of the true Green’s function, introducing uncertainties to the information recovered from them. However, there are still many cases in which the source-receiver geometries are suitable for seismic interferometry, u...
| Main Authors: | , |
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| Format: | Technical Report |
| Language: | en_US |
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Massachusetts Institute of Technology. Earth Resources Laboratory
2014
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| Online Access: | http://hdl.handle.net/1721.1/90453 |
| _version_ | 1826198607541305344 |
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| author | Melo, Gabriela Malcolm, Alison E. |
| author2 | Massachusetts Institute of Technology. Earth Resources Laboratory |
| author_facet | Massachusetts Institute of Technology. Earth Resources Laboratory Melo, Gabriela Malcolm, Alison E. |
| author_sort | Melo, Gabriela |
| collection | MIT |
| description | In general, Green’s functions obtained with seismic interferometry are only estimates of the true Green’s function, introducing uncertainties to the information recovered from them. However, there are still many cases in which the source-receiver geometries are suitable for seismic interferometry, usually allowing the recovery of kinematic information. Here we show how to use the singular value decomposition to re-enforce the accuracy of traveltimes obtained from interferometric Green’s functions. We apply the combination of seismic interferometry and the singular value decomposition to obtain physically accurate inter-event traveltimes for microquake pairs at a geothermal reservoir. With a synthetic example, we show that the P-wave phase and coda-wave energy information are closer to correct with the singular value decomposition than without. These traveltimes could be used for velocity tomography and event location algorithms to obtain more accurate event locations and locally accurate velocity models. |
| first_indexed | 2024-09-23T11:07:26Z |
| format | Technical Report |
| id | mit-1721.1/90453 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:07:26Z |
| publishDate | 2014 |
| publisher | Massachusetts Institute of Technology. Earth Resources Laboratory |
| record_format | dspace |
| spelling | mit-1721.1/904532019-04-10T23:50:29Z SVD enhanced seismic interferometry for traveltime estimates between microquakes Melo, Gabriela Malcolm, Alison E. Massachusetts Institute of Technology. Earth Resources Laboratory Microseismic Interferometry In general, Green’s functions obtained with seismic interferometry are only estimates of the true Green’s function, introducing uncertainties to the information recovered from them. However, there are still many cases in which the source-receiver geometries are suitable for seismic interferometry, usually allowing the recovery of kinematic information. Here we show how to use the singular value decomposition to re-enforce the accuracy of traveltimes obtained from interferometric Green’s functions. We apply the combination of seismic interferometry and the singular value decomposition to obtain physically accurate inter-event traveltimes for microquake pairs at a geothermal reservoir. With a synthetic example, we show that the P-wave phase and coda-wave energy information are closer to correct with the singular value decomposition than without. These traveltimes could be used for velocity tomography and event location algorithms to obtain more accurate event locations and locally accurate velocity models. United States. Dept. of Energy (Grant DE-FG36-08GO18197); Massachusetts Institute of Technology. Earth Resources Laboratory 2014-09-30T12:20:03Z 2014-09-30T12:20:03Z 2011 Technical Report http://hdl.handle.net/1721.1/90453 en_US Earth Resources Laboratory Industry Consortia Annual Report;2011-18 application/pdf Massachusetts Institute of Technology. Earth Resources Laboratory |
| spellingShingle | Microseismic Interferometry Melo, Gabriela Malcolm, Alison E. SVD enhanced seismic interferometry for traveltime estimates between microquakes |
| title | SVD enhanced seismic interferometry for traveltime estimates between microquakes |
| title_full | SVD enhanced seismic interferometry for traveltime estimates between microquakes |
| title_fullStr | SVD enhanced seismic interferometry for traveltime estimates between microquakes |
| title_full_unstemmed | SVD enhanced seismic interferometry for traveltime estimates between microquakes |
| title_short | SVD enhanced seismic interferometry for traveltime estimates between microquakes |
| title_sort | svd enhanced seismic interferometry for traveltime estimates between microquakes |
| topic | Microseismic Interferometry |
| url | http://hdl.handle.net/1721.1/90453 |
| work_keys_str_mv | AT melogabriela svdenhancedseismicinterferometryfortraveltimeestimatesbetweenmicroquakes AT malcolmalisone svdenhancedseismicinterferometryfortraveltimeestimatesbetweenmicroquakes |