{"created":"2023-03-31T01:41:22.807280+00:00","id":4014,"links":{},"metadata":{"_buckets":{"deposit":"3cdae38d-fbb8-49e8-8183-cac75313bafb"},"_deposit":{"id":"4014","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"4014"},"status":"published"},"_oai":{"id":"oai:nied-repo.bosai.go.jp:00004014","sets":[]},"author_link":[],"item_10001_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2014-10"},"bibliographicIssueNumber":"10","bibliographicPageEnd":"7822","bibliographicPageStart":"7805","bibliographicVolumeNumber":"119","bibliographic_titles":[{"bibliographic_title":"JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH","bibliographic_titleLang":"en"}]}]},"item_10001_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"We estimated the S wave attenuation structure in southwestern Japan and the western Nankai Trough by analyzing maximum S wave amplitudes at 4-8, 8-16, and 16-32Hz with a correction term for apparent amplitude attenuation due to multiple forward scattering. Because the estimated attenuation (Q(-1)) in our tomographic study was much larger than Q(-1) due to wide-angle scattering, our estimated Q(-1) was composed mainly of intrinsic attenuation. High-attenuation areas (Q(-1)>1/300 at 4-8Hz) were imaged beneath Quaternary volcanoes and south off Shikoku. Low (<1/1500 at 4-8Hz) or moderate Q(-1) (1/500-1/1000 at 4-8Hz) was imaged beneath Shikoku and nonvolcanic areas of Chugoku. High and moderate Q(-1) in and around Shikoku are located near the top of subducting Philippine Sea Plate. This correspondence implies that these high and moderate Q(-1) reflect fluid in the subducting slab. By applying a theoretical model of attenuation in water-saturated porous random media, we examined wave-induced fluid flow induced by lower frequency (<1Hz) seismic waves that may be related with triggering of nonvolcanic tremor by surface waves. Even though Q(-1) structure in this study cannot fully explain the tremor triggering by wave-induced fluid flow, large uncertainties of Q(-1) in tremor zone suggest that high resolution imaging of Q(-1) and random inhomogeneities would give some constraints for the spatial variation of permeability and other medium properties.\nKey Points <list list-type=\"bulleted\" id=\"jgrb50863-list-0001\"><list-item id=\"jgrb50863-li-0001\">Attenuation structure is estimated by removing scattering attenuation<list-item id=\"jgrb50863-li-0002\">A rift zone shows a peculiar combination of random inhomogeneity and 1/Q<list-item id=\"jgrb50863-li-0003\">1/Q in subducting slab is examined in terms of fluid distribution and dynamics","subitem_description_language":"en","subitem_description_type":"Other"}]},"item_10001_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"AMER GEOPHYSICAL UNION","subitem_publisher_language":"en"}]},"item_10001_relation_14":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"10.1002/2014JB011103"}}]},"item_10001_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"2169-9356","subitem_source_identifier_type":"EISSN"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Tsutomu Takahashi","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Koichiro Obana","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Yojiro Yamamoto","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Ayako Nakanishi","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Shuichi Kodaira","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Yoshiyuki Kaneda","creatorNameLang":"en"}]}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_title":"S wave attenuation structure on the western side of the Nankai subduction zone: Implications for fluid distribution and dynamics","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"S wave attenuation structure on the western side of the Nankai subduction zone: Implications for fluid distribution and dynamics","subitem_title_language":"en"}]},"item_type_id":"40001","owner":"1","path":["1670839190650"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2023-03-30"},"publish_date":"2023-03-30","publish_status":"0","recid":"4014","relation_version_is_last":true,"title":["S wave attenuation structure on the western side of the Nankai subduction zone: Implications for fluid distribution and dynamics"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-03-31T01:41:26.399876+00:00"}