Amplitude ratio tomography for regional phase Q
We image regional seismic phase attenuation (Q) by extending amplitude ratio techniques, which are widely used to determine average Q within a sampled region, to obtain laterally varying Q structure using tomographic techniques. The method assumes that source radiation is isotropic and that the ampl...
Gespeichert in:
| Veröffentlicht in: | Geophysical research letters 2005-11, Vol.32 (21), p.L21301.1-n/a |
|---|---|
| Hauptverfasser: | , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | n/a |
|---|---|
| container_issue | 21 |
| container_start_page | L21301.1 |
| container_title | Geophysical research letters |
| container_volume | 32 |
| creator | Phillips, W. S. Hartse, H. E. Rutledge, J. T. |
| description | We image regional seismic phase attenuation (Q) by extending amplitude ratio techniques, which are widely used to determine average Q within a sampled region, to obtain laterally varying Q structure using tomographic techniques. The method assumes that source radiation is isotropic and that the amplitude ratios can be modeled by a two‐dimensional Q map and relative site terms. Application to 2286, 1‐Hz Lg amplitudes from 816 events recorded at 35 central and east Asia stations yields a misfit of 0.09 log10 units, a variance reduction of 73%, relative to the uniform Q model that best fits the data, and laterally varying Q from 100 to 1000, with patterns closely following regional geology. The image is resolved, on average, to 2.5°, with resolution peaking at 1.5° in the best covered areas, which is remarkable given the sparse station geometry employed. The high resolution results from the dense distribution of earthquake sources, and is aided by the increased confidence in source locations provided by merging catalogs from many different agencies. |
| doi_str_mv | 10.1029/2005GL023870 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_28944958</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>28042415</sourcerecordid><originalsourceid>FETCH-LOGICAL-a4316-8dd7d450c9779be8485f742f410e6cd99978c55e53118187462044e331912253</originalsourceid><addsrcrecordid>eNqNkD1PwzAQhi0EEqWw8QOywETo-Su2x6pAihSBQJVgs0zitIGkCXYq6L8nUSpgQkx3w_M-unsROsVwiYGoCQHgcQKESgF7aIQVY6EEEPtoBKC6nYjoEB15_woAFCgeocm0asqi3WQ2cKYt6qCtq3rpTLPaBnntAmeXRb02ZdCsjLfBwzE6yE3p7clujtHi5noxm4fJfXw7myahYRRHocwykTEOqRJCvVjJJM8FIznDYKM0U0oJmXJuOcVYYilYRIAxSylWmBBOx-h80Dauft9Y3-qq8KktS7O29cZrIrvfFJf_AIERhnvjxQCmrvbe2Vw3rqiM22oMum9P_26vw892XuNTU-bOrNPC_2QE7U_vOTJwH0Vpt386dfyYEKA86kLhECp8az-_Q8a96UhQwfXTXazV4pleCT7XQL8AfxmIpw</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>28042415</pqid></control><display><type>article</type><title>Amplitude ratio tomography for regional phase Q</title><source>Wiley Online Library Free Content</source><source>Access via Wiley Online Library</source><source>Wiley-Blackwell AGU Digital Library</source><source>EZB-FREE-00999 freely available EZB journals</source><creator>Phillips, W. S. ; Hartse, H. E. ; Rutledge, J. T.</creator><creatorcontrib>Phillips, W. S. ; Hartse, H. E. ; Rutledge, J. T.</creatorcontrib><description>We image regional seismic phase attenuation (Q) by extending amplitude ratio techniques, which are widely used to determine average Q within a sampled region, to obtain laterally varying Q structure using tomographic techniques. The method assumes that source radiation is isotropic and that the amplitude ratios can be modeled by a two‐dimensional Q map and relative site terms. Application to 2286, 1‐Hz Lg amplitudes from 816 events recorded at 35 central and east Asia stations yields a misfit of 0.09 log10 units, a variance reduction of 73%, relative to the uniform Q model that best fits the data, and laterally varying Q from 100 to 1000, with patterns closely following regional geology. The image is resolved, on average, to 2.5°, with resolution peaking at 1.5° in the best covered areas, which is remarkable given the sparse station geometry employed. The high resolution results from the dense distribution of earthquake sources, and is aided by the increased confidence in source locations provided by merging catalogs from many different agencies.</description><identifier>ISSN: 0094-8276</identifier><identifier>EISSN: 1944-8007</identifier><identifier>DOI: 10.1029/2005GL023870</identifier><identifier>CODEN: GPRLAJ</identifier><language>eng</language><publisher>Washington, DC: Blackwell Publishing Ltd</publisher><subject>Earth sciences ; Earth, ocean, space ; Exact sciences and technology</subject><ispartof>Geophysical research letters, 2005-11, Vol.32 (21), p.L21301.1-n/a</ispartof><rights>Copyright 2005 by the American Geophysical Union.</rights><rights>2006 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a4316-8dd7d450c9779be8485f742f410e6cd99978c55e53118187462044e331912253</citedby><cites>FETCH-LOGICAL-a4316-8dd7d450c9779be8485f742f410e6cd99978c55e53118187462044e331912253</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1029%2F2005GL023870$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1029%2F2005GL023870$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,1417,1433,11514,27924,27925,45574,45575,46409,46468,46833,46892</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=17353110$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Phillips, W. S.</creatorcontrib><creatorcontrib>Hartse, H. E.</creatorcontrib><creatorcontrib>Rutledge, J. T.</creatorcontrib><title>Amplitude ratio tomography for regional phase Q</title><title>Geophysical research letters</title><addtitle>Geophys. Res. Lett</addtitle><description>We image regional seismic phase attenuation (Q) by extending amplitude ratio techniques, which are widely used to determine average Q within a sampled region, to obtain laterally varying Q structure using tomographic techniques. The method assumes that source radiation is isotropic and that the amplitude ratios can be modeled by a two‐dimensional Q map and relative site terms. Application to 2286, 1‐Hz Lg amplitudes from 816 events recorded at 35 central and east Asia stations yields a misfit of 0.09 log10 units, a variance reduction of 73%, relative to the uniform Q model that best fits the data, and laterally varying Q from 100 to 1000, with patterns closely following regional geology. The image is resolved, on average, to 2.5°, with resolution peaking at 1.5° in the best covered areas, which is remarkable given the sparse station geometry employed. The high resolution results from the dense distribution of earthquake sources, and is aided by the increased confidence in source locations provided by merging catalogs from many different agencies.</description><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><issn>0094-8276</issn><issn>1944-8007</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2005</creationdate><recordtype>article</recordtype><recordid>eNqNkD1PwzAQhi0EEqWw8QOywETo-Su2x6pAihSBQJVgs0zitIGkCXYq6L8nUSpgQkx3w_M-unsROsVwiYGoCQHgcQKESgF7aIQVY6EEEPtoBKC6nYjoEB15_woAFCgeocm0asqi3WQ2cKYt6qCtq3rpTLPaBnntAmeXRb02ZdCsjLfBwzE6yE3p7clujtHi5noxm4fJfXw7myahYRRHocwykTEOqRJCvVjJJM8FIznDYKM0U0oJmXJuOcVYYilYRIAxSylWmBBOx-h80Dauft9Y3-qq8KktS7O29cZrIrvfFJf_AIERhnvjxQCmrvbe2Vw3rqiM22oMum9P_26vw892XuNTU-bOrNPC_2QE7U_vOTJwH0Vpt386dfyYEKA86kLhECp8az-_Q8a96UhQwfXTXazV4pleCT7XQL8AfxmIpw</recordid><startdate>200511</startdate><enddate>200511</enddate><creator>Phillips, W. S.</creator><creator>Hartse, H. E.</creator><creator>Rutledge, J. T.</creator><general>Blackwell Publishing Ltd</general><general>American Geophysical Union</general><scope>BSCLL</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SM</scope><scope>8FD</scope><scope>FR3</scope><scope>KR7</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>200511</creationdate><title>Amplitude ratio tomography for regional phase Q</title><author>Phillips, W. S. ; Hartse, H. E. ; Rutledge, J. T.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a4316-8dd7d450c9779be8485f742f410e6cd99978c55e53118187462044e331912253</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2005</creationdate><topic>Earth sciences</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Phillips, W. S.</creatorcontrib><creatorcontrib>Hartse, H. E.</creatorcontrib><creatorcontrib>Rutledge, J. T.</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><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><jtitle>Geophysical research letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Phillips, W. S.</au><au>Hartse, H. E.</au><au>Rutledge, J. T.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Amplitude ratio tomography for regional phase Q</atitle><jtitle>Geophysical research letters</jtitle><addtitle>Geophys. Res. Lett</addtitle><date>2005-11</date><risdate>2005</risdate><volume>32</volume><issue>21</issue><spage>L21301.1</spage><epage>n/a</epage><pages>L21301.1-n/a</pages><issn>0094-8276</issn><eissn>1944-8007</eissn><coden>GPRLAJ</coden><abstract>We image regional seismic phase attenuation (Q) by extending amplitude ratio techniques, which are widely used to determine average Q within a sampled region, to obtain laterally varying Q structure using tomographic techniques. The method assumes that source radiation is isotropic and that the amplitude ratios can be modeled by a two‐dimensional Q map and relative site terms. Application to 2286, 1‐Hz Lg amplitudes from 816 events recorded at 35 central and east Asia stations yields a misfit of 0.09 log10 units, a variance reduction of 73%, relative to the uniform Q model that best fits the data, and laterally varying Q from 100 to 1000, with patterns closely following regional geology. The image is resolved, on average, to 2.5°, with resolution peaking at 1.5° in the best covered areas, which is remarkable given the sparse station geometry employed. The high resolution results from the dense distribution of earthquake sources, and is aided by the increased confidence in source locations provided by merging catalogs from many different agencies.</abstract><cop>Washington, DC</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1029/2005GL023870</doi><tpages>4</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0094-8276 |
| ispartof | Geophysical research letters, 2005-11, Vol.32 (21), p.L21301.1-n/a |
| issn | 0094-8276 1944-8007 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_28944958 |
| source | Wiley Online Library Free Content; Access via Wiley Online Library; Wiley-Blackwell AGU Digital Library; EZB-FREE-00999 freely available EZB journals |
| subjects | Earth sciences Earth, ocean, space Exact sciences and technology |
| title | Amplitude ratio tomography for regional phase Q |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-01T20%3A39%3A07IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Amplitude%20ratio%20tomography%20for%20regional%20phase%20Q&rft.jtitle=Geophysical%20research%20letters&rft.au=Phillips,%20W.%20S.&rft.date=2005-11&rft.volume=32&rft.issue=21&rft.spage=L21301.1&rft.epage=n/a&rft.pages=L21301.1-n/a&rft.issn=0094-8276&rft.eissn=1944-8007&rft.coden=GPRLAJ&rft_id=info:doi/10.1029/2005GL023870&rft_dat=%3Cproquest_cross%3E28042415%3C/proquest_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=28042415&rft_id=info:pmid/&rfr_iscdi=true |