{"created":"2021-03-01T07:13:04.357964+00:00","id":51812,"links":{},"metadata":{"_buckets":{"deposit":"36fa94f0-158f-4ea4-aa57-cacfba2dce97"},"_deposit":{"id":"51812","owner":"1","owners":[],"pid":{"revision_id":0,"type":"depid","value":"51812"},"status":"published"},"_oai":{"id":"oai:repository.dl.itc.u-tokyo.ac.jp:00051812","sets":["80:4535:7677:8086","9:504:4538:7675:8085"]},"author_link":["154971","154970"],"item_4_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"Seismic Velocity Changes Associated with Seismic and Volcanic Activity (Special Issue: “Possible Effect of Mega Earthquake on Long-term Volcanic Activity” Part 2)"}]},"item_4_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2017","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"2-4","bibliographicPageEnd":"90","bibliographicPageStart":"81","bibliographicVolumeNumber":"92","bibliographic_titles":[{"bibliographic_title":"東京大学地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo"}]}]},"item_4_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Recent developments in seismic networks and processing methods allow researchers to delineate temporal changes of seismic velocities associated with static and dynamic stress perturbations. In particular, the emergence of seismic interferometry, with which a seismic wavefield can be reconstructed from random signals such as ocean hum, anthropogenic activity, or seismic coda, enables subtle changes of seismic velocities down to much less than 0.1 % to be delineated. A compilation of recent studies suggests that observed seismic velocity changes do not correlate with static or dynamic stress changes nor shallow subsurface structures, although volcanic areas are found to be more susceptible to stress perturbations. However, the physics behind the observed velocity changes is not understood. Therefore, the current challenge is to understand the mechanism behind changes in seismic velocities due to stress perturbations with the aid of insights gained from theoretical and experimental considerations which, for example, take third-order elasticity and crack generation during stress perturbation into account. To do so in a sophisticated way requires seismic velocity changes to be imaged with a higher spatial resolution. This will be achieved by making more use of body waves and constructing a three-dimensional sensitivity kernel of seismic velocity changes.","subitem_description_type":"Abstract"}]},"item_4_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"154971","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Aoki, Yosuke"}]}]},"item_4_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15083/0000051812","subitem_identifier_reg_type":"JaLC"}]},"item_4_publisher_20":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"東京大学地震研究所"}]},"item_4_select_14":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_select_item":"publisher"}]},"item_4_source_id_10":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN00162258","subitem_source_identifier_type":"NCID"}]},"item_4_source_id_8":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"00408972","subitem_source_identifier_type":"ISSN"}]},"item_4_text_21":{"attribute_name":"出版者別名","attribute_value_mlt":[{"subitem_text_value":"Earthquake Research Institute, University of Tokyo"}]},"item_4_text_4":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"東京大学地震研究所"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"青木, 陽介"}],"nameIdentifiers":[{"nameIdentifier":"154970","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2019-05-07"}],"displaytype":"detail","filename":"IHO922404.pdf","filesize":[{"value":"3.8MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"IHO922404.pdf","url":"https://repository.dl.itc.u-tokyo.ac.jp/record/51812/files/IHO922404.pdf"},"version_id":"c79f4aff-b724-4859-9dd3-b827a8c9e040"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"seismic velocity changes","subitem_subject_scheme":"Other"},{"subitem_subject":"seismic interferometry","subitem_subject_scheme":"Other"},{"subitem_subject":"third-order elasticity","subitem_subject_scheme":"Other"},{"subitem_subject":"crack-induced seismic velocity reduction","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"地震・火山活動にともなう地震波速度変化  (特集:「巨大地震と火山活動」Part 2)","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"地震・火山活動にともなう地震波速度変化  (特集:「巨大地震と火山活動」Part 2)","subitem_title_language":"ja"}]},"item_type_id":"4","owner":"1","path":["8086","8085"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2019-05-07"},"publish_date":"2019-05-07","publish_status":"0","recid":"51812","relation_version_is_last":true,"title":["地震・火山活動にともなう地震波速度変化  (特集:「巨大地震と火山活動」Part 2)"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2022-12-19T05:16:57.060462+00:00"}