Shear‐Wave Velocity Structure of Sediments on Cascadia's Continental Margin From Probabilistic Inversion of Seafloor Compliance Data
Abstract Several seismic techniques, both passive and active, exist for estimating the shear‐wave velocity VS structure of shallow sedimentary structures. In particular, passive compliance signals recorded by broadband ocean‐bottom seismometers (OBSs) can be used to invert for VS structure. While co...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-09-01
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| Series: | Geochemistry, Geophysics, Geosystems |
| Subjects: | |
| Online Access: | https://doi.org/10.1029/2021GC009720 |
| _version_ | 1797638115186180096 |
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| author | Stephen G. Mosher Pascal Audet Jeremy M. Gosselin |
| author_facet | Stephen G. Mosher Pascal Audet Jeremy M. Gosselin |
| author_sort | Stephen G. Mosher |
| collection | DOAJ |
| description | Abstract Several seismic techniques, both passive and active, exist for estimating the shear‐wave velocity VS structure of shallow sedimentary structures. In particular, passive compliance signals recorded by broadband ocean‐bottom seismometers (OBSs) can be used to invert for VS structure. While compliance‐based imaging studies have been carried out at several locations across the Cascadia Subduction Zone, such an approach has not been extensively applied to OBSs deployed on the continental shelf and slope. In this study, we measure compliance and coherence signals at 13 broadband OBSs deployed along Cascadia's continental shelf and upper slope. We then use a recently developed technique to probabilistically invert compliance signals for shallow VS structure that makes use of mixture density neural networks. Finally, we compare and contrast our inverted VS profiles and derived properties obtained using this method with previous studies focused on the properties of basin sediments. |
| first_indexed | 2024-03-11T12:58:58Z |
| format | Article |
| id | doaj.art-df4472f4d10a4a80b6d520f4a949ebc7 |
| institution | Directory Open Access Journal |
| issn | 1525-2027 |
| language | English |
| last_indexed | 2024-03-11T12:58:58Z |
| publishDate | 2021-09-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geochemistry, Geophysics, Geosystems |
| spelling | doaj.art-df4472f4d10a4a80b6d520f4a949ebc72023-11-03T16:55:50ZengWileyGeochemistry, Geophysics, Geosystems1525-20272021-09-01229n/an/a10.1029/2021GC009720Shear‐Wave Velocity Structure of Sediments on Cascadia's Continental Margin From Probabilistic Inversion of Seafloor Compliance DataStephen G. Mosher0Pascal Audet1Jeremy M. Gosselin2Department of Earth and Environmental Sciences University of Ottawa Ottawa ON CanadaDepartment of Earth and Environmental Sciences University of Ottawa Ottawa ON CanadaDepartment of Earth and Environmental Sciences University of Ottawa Ottawa ON CanadaAbstract Several seismic techniques, both passive and active, exist for estimating the shear‐wave velocity VS structure of shallow sedimentary structures. In particular, passive compliance signals recorded by broadband ocean‐bottom seismometers (OBSs) can be used to invert for VS structure. While compliance‐based imaging studies have been carried out at several locations across the Cascadia Subduction Zone, such an approach has not been extensively applied to OBSs deployed on the continental shelf and slope. In this study, we measure compliance and coherence signals at 13 broadband OBSs deployed along Cascadia's continental shelf and upper slope. We then use a recently developed technique to probabilistically invert compliance signals for shallow VS structure that makes use of mixture density neural networks. Finally, we compare and contrast our inverted VS profiles and derived properties obtained using this method with previous studies focused on the properties of basin sediments.https://doi.org/10.1029/2021GC009720versusneural networksinverse theoryOBSshallow sediment structure |
| spellingShingle | Stephen G. Mosher Pascal Audet Jeremy M. Gosselin Shear‐Wave Velocity Structure of Sediments on Cascadia's Continental Margin From Probabilistic Inversion of Seafloor Compliance Data Geochemistry, Geophysics, Geosystems versus neural networks inverse theory OBS shallow sediment structure |
| title | Shear‐Wave Velocity Structure of Sediments on Cascadia's Continental Margin From Probabilistic Inversion of Seafloor Compliance Data |
| title_full | Shear‐Wave Velocity Structure of Sediments on Cascadia's Continental Margin From Probabilistic Inversion of Seafloor Compliance Data |
| title_fullStr | Shear‐Wave Velocity Structure of Sediments on Cascadia's Continental Margin From Probabilistic Inversion of Seafloor Compliance Data |
| title_full_unstemmed | Shear‐Wave Velocity Structure of Sediments on Cascadia's Continental Margin From Probabilistic Inversion of Seafloor Compliance Data |
| title_short | Shear‐Wave Velocity Structure of Sediments on Cascadia's Continental Margin From Probabilistic Inversion of Seafloor Compliance Data |
| title_sort | shear wave velocity structure of sediments on cascadia s continental margin from probabilistic inversion of seafloor compliance data |
| topic | versus neural networks inverse theory OBS shallow sediment structure |
| url | https://doi.org/10.1029/2021GC009720 |
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