{"created":"2021-03-01T07:13:04.149552+00:00","id":51809,"links":{},"metadata":{"_buckets":{"deposit":"4fbec473-383b-46ed-aa45-d0c85438e24a"},"_deposit":{"id":"51809","owner":"1","owners":[],"pid":{"revision_id":0,"type":"depid","value":"51809"},"status":"published"},"_oai":{"id":"oai:repository.dl.itc.u-tokyo.ac.jp:00051809","sets":["80:4535:7677:8086","9:504:4538:7675:8085"]},"author_link":["154961","154960"],"item_4_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"Great Earthquakes in the 17th Century along the Kuril and Japan Trenches (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":"47","bibliographicPageStart":"31","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":"The 2011 Tohoku earthquake (M 9.0) was much larger than typical interplate earthquakes (M<8) that occur repeatedly along the Japan Trench. Recent paleoseismological studies indicate that a similar giant earthquake occurred along the Kuril Trench off Hokkaido in the 17th century. Three volcanoes in southwest Hokkaido also erupted in the 17-18th century: Komagatake in 1640 and 1694, Usu in 1663, and Tarumai in 1667 and 1739. Geological evidence of the 17th century earthquake, such as sharp contact of peat and mud layers indicating sudden coastal uplift or a sand layer indicating tsunami inundation, was found beneath tephra layers from these volcanoes. Evidence of coastal uplift may solve a long-standing enigma of coastal movement: long-term uplift inferred from marine terraces versus recent subsidence recorded with tide gauges. Several fault models of the 17th century earthquake were proposed and tested with tsunami numerical simulations. They are: giant fault extending beneath coasts (85 km depth), multi-segment interplate earthquakes, and tsunami earthquakes near the trench axis. Comparison of simulated inundation areas with the distribution of tsunami deposits showed that the best model of the 17th century earthquake was a multi-segment interplate earthquake with Mw =8.5, but this was modified recently to include a large slip near the trench axis, similar to the 2011 Tohoku earthquake, with Mw =8.8. Older tsunami deposits prior to the 17th century were also found along the Pacific coast of Hokkaido. While the average recurrence interval is estimated to be roughly 500 years based on tephrochronology, recent studies of continuous geological samples show that the recurrence interval varies from 100 to 800 years based on radiocarbon ages. The three volcanoes in southwest Hokkaido belong to the Honshu arc rather than the Kuril arc, hence the earthquake related to these eruptions may be the one along the Japan Trench rather than the Kuril Trench. Along the Japan Trench in northern Tohoku region, the history of past tsunamis has been documented since the Keicho tsunami of 1611, which caused devastating tsunami damage, while no damage from ground shaking was recorded. If it was similar to the 1896 Sanriku tsunami earthquake, with the fault motion limited near the trench axis, it is unlikely that such a shallow slip would affect volcanic eruptions. The sources of the 17th century Hokkaido earthquake and the 1611 Keicho tsunami seem to be different, because fault models along the Kuril Trench off Hokkaido would produce a negligible tsunami on the Tohoku coast, and if the 1611 source extended along both the Japan and Kuril Trenches, such a giant fault would produce damaging ground shaking in Tohoku. Annual varves of lacustrine deposit in Harutori-ko (Kushiro) suggest that the 17th century earthquake occurred in 1636. For the relation between giant earthquakes and volcanic eruptions, the facts that large-scale (VEI = 5) eruptions occurred only in the 17th century, while giant earthquakes have recurred during the last several thousand years, have to be considered.","subitem_description_type":"Abstract"}]},"item_4_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"154961","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Satake, Kenji"}]}]},"item_4_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15083/0000051809","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":"佐竹, 健治"}],"nameIdentifiers":[{"nameIdentifier":"154960","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":"IHO922401.pdf","filesize":[{"value":"12.6MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"IHO922401.pdf","url":"https://repository.dl.itc.u-tokyo.ac.jp/record/51809/files/IHO922401.pdf"},"version_id":"1b962ba3-73fe-4c74-bddd-780710081479"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"great earthquakes","subitem_subject_scheme":"Other"},{"subitem_subject":"volcanic eruption","subitem_subject_scheme":"Other"},{"subitem_subject":"Kuril Trench","subitem_subject_scheme":"Other"},{"subitem_subject":"Japan Trench","subitem_subject_scheme":"Other"},{"subitem_subject":"tsunami","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":"17世紀に千島・日本海溝で発生した巨大地震 (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":"17世紀に千島・日本海溝で発生した巨大地震 (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":"51809","relation_version_is_last":true,"title":["17世紀に千島・日本海溝で発生した巨大地震 (特集:「巨大地震と火山活動」Part 2)"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2022-12-19T05:37:57.460911+00:00"}