{"created":"2023-03-31T01:41:22.560199+00:00","id":4013,"links":{},"metadata":{"_buckets":{"deposit":"f8e83a9d-68aa-424a-9325-07c4f44cb538"},"_deposit":{"id":"4013","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"4013"},"status":"published"},"_oai":{"id":"oai:nied-repo.bosai.go.jp:00004013","sets":[]},"author_link":[],"item_10001_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2014-08"},"bibliographicIssueNumber":"8","bibliographicPageEnd":"6511","bibliographicPageStart":"6486","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":"In this study, we imaged a detailed seismic attenuation structure (frequency-independent Q(-1)) beneath Hokkaido, Japan, by merging waveform data from a dense permanent seismic network with those from a very dense temporary network. Corner frequency of each event used for t* estimation was determined by the S coda wave spectral ratio method. The seismic attenuation (Q(p)(-1)) structure is clearly imaged at depths down to about 120 km. For the fore-arc side of Hokkaido, high-Q(p) zones are imaged at depths of 10 to 80 km in the crust and mantle wedge above the Pacific slab. Low-Q(p) zones are clearly imaged in the mantle wedge beneath the back-arc areas of eastern and southern Hokkaido. These low-Q(p) zones, extending from deeper regions, extend to the Moho beneath volcanoes, the locations of which are consistent with those of seismic low-velocity regions. These results suggest that the mantle wedge upwelling flow occurs beneath Hokkaido, except in the area where there is a gap in the volcano chain. In contrast, an inhomogeneous seismic attenuation structure is clearly imaged beneath the Hokkaido corner. A broad low-Q(p) zone is located at depths of 0-60 km to the west of the Hidaka main thrust. The location almost corresponds to that of the seismic low-velocity zone in the collision zone. The fault planes of the 1970 M6.7 and 1982 M7.1 earthquakes are located at the edges of this broad low-Q(p) zone. Observations in this study indicate that our findings contribute to understanding the detailed arc-arc collision process, magmatism, and seismotectonics beneath Hokkaido.","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":"10.1002/2014JB011099"}}]},"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":"Saeko Kita","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Junichi Nakajima","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Akira Hasegawa","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Tomomi Okada","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Kei Katsumata","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Youichi Asano","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Takeshi Kimura","creatorNameLang":"en"}]}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_title":"Detailed seismic attenuation structure beneath Hokkaido, northeastern Japan: Arc-arc collision process, arc magmatism, and seismotectonics","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Detailed seismic attenuation structure beneath Hokkaido, northeastern Japan: Arc-arc collision process, arc magmatism, and seismotectonics","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":"4013","relation_version_is_last":true,"title":["Detailed seismic attenuation structure beneath Hokkaido, northeastern Japan: Arc-arc collision process, arc magmatism, and seismotectonics"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-03-31T01:41:26.535658+00:00"}