Shear wave structure from joint analysis of seismic and seafloor compliance data
SUMMARY Determining shear wave structure is the key to identifying the amount and location of fluid within the crust. Seismic and seafloor compliance methods provide independent estimates of shear wave structure, and a joint analysis of the two data sets should provide better constraints on the prop...
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| Veröffentlicht in: | Geophysical journal international 2003-11, Vol.155 (2), p.514-520 |
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| container_title | Geophysical journal international |
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| creator | Hulme, Tom Ricolleau, Angèle Bazin, Sara Crawford, Wayne C. Singh, S. C. |
| description | SUMMARY
Determining shear wave structure is the key to identifying the amount and location of fluid within the crust. Seismic and seafloor compliance methods provide independent estimates of shear wave structure, and a joint analysis of the two data sets should provide better constraints on the properties of the uppermost oceanic crust. We consider an example from 9°33′N on the East Pacific Rise. Seismic data from an on‐axis expanding spread profile have been reanalysed to determine a shear wave structure for layer 2B; pS arrivals require a high shear wave velocity within this layer (Poisson ratio in the range 0.22–0.25). Compliance data from the same location are seemingly inconsistent with this result, requiring that layer 2B is a region of low shear wave velocity (Poisson ratio in the range 0.33–0.44). The quantitative differences between the two results can be explained by anelasticity and anisotropy; conversely, a knowledge of this discrepancy can be used to constrain the attenuation structure. |
| doi_str_mv | 10.1046/j.1365-246X.2003.02061.x |
| format | Article |
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Determining shear wave structure is the key to identifying the amount and location of fluid within the crust. Seismic and seafloor compliance methods provide independent estimates of shear wave structure, and a joint analysis of the two data sets should provide better constraints on the properties of the uppermost oceanic crust. We consider an example from 9°33′N on the East Pacific Rise. Seismic data from an on‐axis expanding spread profile have been reanalysed to determine a shear wave structure for layer 2B; pS arrivals require a high shear wave velocity within this layer (Poisson ratio in the range 0.22–0.25). Compliance data from the same location are seemingly inconsistent with this result, requiring that layer 2B is a region of low shear wave velocity (Poisson ratio in the range 0.33–0.44). The quantitative differences between the two results can be explained by anelasticity and anisotropy; conversely, a knowledge of this discrepancy can be used to constrain the attenuation structure.</description><identifier>ISSN: 0956-540X</identifier><identifier>EISSN: 1365-246X</identifier><identifier>DOI: 10.1046/j.1365-246X.2003.02061.x</identifier><language>eng</language><publisher>23 Ainslie Place , Edinburgh EH3 6AJ , UK . Telephone 226 7232 Fax 226 3803: Blackwell Science Ltd</publisher><subject>anelasticity ; attenuation ; oceanic crust ; Sciences of the Universe ; seismic velocities</subject><ispartof>Geophysical journal international, 2003-11, Vol.155 (2), p.514-520</ispartof><rights>Attribution</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a4811-fa74faf158b8dc82481f0c8971c14c70d3abc0e87d053c8c5b915b8e146e55783</citedby><cites>FETCH-LOGICAL-a4811-fa74faf158b8dc82481f0c8971c14c70d3abc0e87d053c8c5b915b8e146e55783</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1046%2Fj.1365-246X.2003.02061.x$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1046%2Fj.1365-246X.2003.02061.x$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>230,314,780,784,885,1417,27924,27925,45574,45575</link.rule.ids><backlink>$$Uhttps://insu.hal.science/insu-03598406$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Hulme, Tom</creatorcontrib><creatorcontrib>Ricolleau, Angèle</creatorcontrib><creatorcontrib>Bazin, Sara</creatorcontrib><creatorcontrib>Crawford, Wayne C.</creatorcontrib><creatorcontrib>Singh, S. C.</creatorcontrib><title>Shear wave structure from joint analysis of seismic and seafloor compliance data</title><title>Geophysical journal international</title><description>SUMMARY
Determining shear wave structure is the key to identifying the amount and location of fluid within the crust. Seismic and seafloor compliance methods provide independent estimates of shear wave structure, and a joint analysis of the two data sets should provide better constraints on the properties of the uppermost oceanic crust. We consider an example from 9°33′N on the East Pacific Rise. Seismic data from an on‐axis expanding spread profile have been reanalysed to determine a shear wave structure for layer 2B; pS arrivals require a high shear wave velocity within this layer (Poisson ratio in the range 0.22–0.25). Compliance data from the same location are seemingly inconsistent with this result, requiring that layer 2B is a region of low shear wave velocity (Poisson ratio in the range 0.33–0.44). The quantitative differences between the two results can be explained by anelasticity and anisotropy; conversely, a knowledge of this discrepancy can be used to constrain the attenuation structure.</description><subject>anelasticity</subject><subject>attenuation</subject><subject>oceanic crust</subject><subject>Sciences of the Universe</subject><subject>seismic velocities</subject><issn>0956-540X</issn><issn>1365-246X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2003</creationdate><recordtype>article</recordtype><recordid>eNqNkU9r3DAQxUVJoZu030GnHgJ2R9Yfy4ccQmg2KQsptIXcxKwsES22tZXsJPvtY3dLrslphpnfG4b3CKEMSgZCfduVjCtZVELdlxUAL6ECxcrnD2T1ujghK2ikKqSA-0_kNOcdABNM6BX5-evBYaJP-OhoHtNkxyk56lPs6S6GYaQ4YHfIIdPoaXYh98HOs3bu0XcxJmpjv-8CDtbRFkf8TD567LL78r-ekT_X339f3RSbu_Xt1eWmQKEZKzzWwqNnUm91a3U1Dz1Y3dTMMmFraDluLThdtyC51VZuGya32jGhnJS15mfk_Hj3ATuzT6HHdDARg7m53Jgw5MkAl40WoB7ZDH89wvsU_04uj6YP2bquw8HFKZtK16pmnL8N1o2aXVYzqI-gTTHn5PzrDwzMEozZmcV_s_hvlmDMv2DM8yy9OEqfQucO79aZ9Y_bpeMvciKUDw</recordid><startdate>200311</startdate><enddate>200311</enddate><creator>Hulme, Tom</creator><creator>Ricolleau, Angèle</creator><creator>Bazin, Sara</creator><creator>Crawford, Wayne C.</creator><creator>Singh, S. C.</creator><general>Blackwell Science Ltd</general><general>Oxford University Press (OUP)</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SM</scope><scope>8FD</scope><scope>FR3</scope><scope>KR7</scope><scope>H8D</scope><scope>L7M</scope><scope>1XC</scope><scope>VOOES</scope></search><sort><creationdate>200311</creationdate><title>Shear wave structure from joint analysis of seismic and seafloor compliance data</title><author>Hulme, Tom ; Ricolleau, Angèle ; Bazin, Sara ; Crawford, Wayne C. ; Singh, S. C.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a4811-fa74faf158b8dc82481f0c8971c14c70d3abc0e87d053c8c5b915b8e146e55783</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2003</creationdate><topic>anelasticity</topic><topic>attenuation</topic><topic>oceanic crust</topic><topic>Sciences of the Universe</topic><topic>seismic velocities</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hulme, Tom</creatorcontrib><creatorcontrib>Ricolleau, Angèle</creatorcontrib><creatorcontrib>Bazin, Sara</creatorcontrib><creatorcontrib>Crawford, Wayne C.</creatorcontrib><creatorcontrib>Singh, S. C.</creatorcontrib><collection>CrossRef</collection><collection>Earthquake Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Hyper Article en Ligne (HAL)</collection><collection>Hyper Article en Ligne (HAL) (Open Access)</collection><jtitle>Geophysical journal international</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hulme, Tom</au><au>Ricolleau, Angèle</au><au>Bazin, Sara</au><au>Crawford, Wayne C.</au><au>Singh, S. C.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Shear wave structure from joint analysis of seismic and seafloor compliance data</atitle><jtitle>Geophysical journal international</jtitle><date>2003-11</date><risdate>2003</risdate><volume>155</volume><issue>2</issue><spage>514</spage><epage>520</epage><pages>514-520</pages><issn>0956-540X</issn><eissn>1365-246X</eissn><abstract>SUMMARY
Determining shear wave structure is the key to identifying the amount and location of fluid within the crust. Seismic and seafloor compliance methods provide independent estimates of shear wave structure, and a joint analysis of the two data sets should provide better constraints on the properties of the uppermost oceanic crust. We consider an example from 9°33′N on the East Pacific Rise. Seismic data from an on‐axis expanding spread profile have been reanalysed to determine a shear wave structure for layer 2B; pS arrivals require a high shear wave velocity within this layer (Poisson ratio in the range 0.22–0.25). Compliance data from the same location are seemingly inconsistent with this result, requiring that layer 2B is a region of low shear wave velocity (Poisson ratio in the range 0.33–0.44). The quantitative differences between the two results can be explained by anelasticity and anisotropy; conversely, a knowledge of this discrepancy can be used to constrain the attenuation structure.</abstract><cop>23 Ainslie Place , Edinburgh EH3 6AJ , UK . Telephone 226 7232 Fax 226 3803</cop><pub>Blackwell Science Ltd</pub><doi>10.1046/j.1365-246X.2003.02061.x</doi><tpages>7</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Geophysical journal international, 2003-11, Vol.155 (2), p.514-520 |
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| language | eng |
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| source | Access via Oxford University Press (Open Access Collection); Access via Wiley Online Library |
| subjects | anelasticity attenuation oceanic crust Sciences of the Universe seismic velocities |
| title | Shear wave structure from joint analysis of seismic and seafloor compliance data |
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