{"created":"2023-03-31T01:58:37.676932+00:00","id":4619,"links":{},"metadata":{"_buckets":{"deposit":"8afa9ff6-d04c-4ae6-b171-89e5d7c23302"},"_deposit":{"id":"4619","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"4619"},"status":"published"},"_oai":{"id":"oai:nied-repo.bosai.go.jp:00004619","sets":[]},"author_link":[],"item_10001_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2015-01","bibliographicIssueDateType":"Issued"},"bibliographicVolumeNumber":"6","bibliographic_titles":[{"bibliographic_title":"NATURE COMMUNICATIONS","bibliographic_titleLang":"en"}]}]},"item_10001_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Excitations of seismic background noises are mostly related to fluid disturbances in the atmosphere, ocean and the solid Earth. Earthquakes have not been considered as a stationary excitation source because they occur intermittently. Here we report that acoustic-coupled Rayleigh waves (at 0.7-2.0 Hz) travelling in the ocean and marine sediments, retrieved by correlating ambient noise on a hydrophone array deployed through a shallow to deep seafloor (100-4,800 m) across the Nankai Trough, Japan, are incessantly excited by nearby small earthquakes. The observed cross-correlation functions and 2D numerical simulations for wave propagation through a laterally heterogeneous ocean-crust system show that, in a subduction zone, energetic wave sources are located primarily under the seafloor in directions consistent with nearby seismicity, and secondarily in the ocean. Short-period background noise in the ocean-crust system in the Nankai subduction zone is mainly attributed to ocean-acoustic Rayleigh waves of earthquake origin.","subitem_description_language":"en","subitem_description_type":"Other"}]},"item_10001_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"NATURE PUBLISHING GROUP","subitem_publisher_language":"en"}]},"item_10001_relation_14":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"10.1038/ncomms7132"}}]},"item_10001_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"2041-1723","subitem_source_identifier_type":"ISSN"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Takashi Tonegawa","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Yoshio Fukao","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Tsutomu Takahashi","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Koichiro Obana","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":"Ambient seafloor noise excited by earthquakes in the Nankai subduction zone","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Ambient seafloor noise excited by earthquakes in the Nankai subduction zone","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":"4619","relation_version_is_last":true,"title":["Ambient seafloor noise excited by earthquakes in the Nankai subduction zone"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-06-08T06:06:38.885619+00:00"}