{"created":"2021-03-01T06:51:31.744140+00:00","id":32814,"links":{},"metadata":{"_buckets":{"deposit":"20c68701-b2ee-43ae-a9a5-ba3d3b32aa98"},"_deposit":{"id":"32814","owner":"1","owners":[],"pid":{"revision_id":0,"type":"depid","value":"32814"},"status":"published"},"_oai":{"id":"oai:repository.dl.itc.u-tokyo.ac.jp:00032814","sets":["80:4535:4747:4751","9:504:4538:4749:4752"]},"author_link":["127751","127752","127753","127754","127755","127746","127747","127748","127749","127750"],"item_4_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"Some Characteristics of the Earthquake Sequence with the Main Shock of M 4.9 on August 24, 1986, at Maruko Town, Eastern Part of Nagano Prefecture, and Its Seismotectonic Implications"}]},"item_4_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1988-12-23","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"3","bibliographicPageEnd":"272","bibliographicPageStart":"237","bibliographicVolumeNumber":"63","bibliographic_titles":[{"bibliographic_title":"東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo"}]}]},"item_4_description_13":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"application/pdf","subitem_description_type":"Other"}]},"item_4_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"北部フォッサマグナの中央隆起帯を横断する千曲川構造線の東端に位置する長野県小県郡丸子町付近で1986年8月24日,M4.9の地震が発生した.ここは2つの火山前線がぶつかる点のすぐ背後でもある.通常の地震活動レベルは低いが,過去には1912年の上田市付近の地震(M5.2)がある.丸子町の地震活動は前震・本震・余震系列と本震の10日後から始まった群発地震が重なったものであった.2回の主要な活動ピークをもつ例は,北部フォッサマグナ地域では少なくなく,ピーク間の間隔は1918年大町地震の13時間,1969年焼岳の地震の2日,1912年上田の地震の5日,今回の地震の12日,1963年燕岳の地震の20日,1897年上高井の地震の104日というように様々である.2回目が群発地震であったのは丸子の地震と,燕岳の地震,上田の地震である.現地における臨時観測によって精密な震源分布が得られた.震源域は時間とともに拡大したが群発地震後最終的には東西3km,南北2km,深さは6kmを中心に3kmの幅をもつ拡がりであった.定常観測網で求めた震源との比較を行い,観測網に依存する震源の系統的なずれやその値のバラツキから震源の絶対精度と相対精度を推定した.MO～4.5の間のM別頻度分布はGutenberg-Richterの関係から少しずれる.群発地震の回数の減衰(p～2)は本震直後の余震のそれ(p～1)と比べ大きい.燕岳の地震ではどちらもp～2であった.本震の震源断層は発震機構及び余震分布の特性から西上り東落ちの高角逆断層である.これは中央隆起帯東縁でのテクトニックな変動と調和する.1986年の千曲構造線の地震活動はそのピークが東南東から西北西へ約150km/yearの速度で伝播した.1912年～1918年にもこの構造線の両端付近で地震があった.約70年の間隔を置いて同じような活動を繰り返したことになる.","subitem_description_type":"Abstract"},{"subitem_description":"The earthquake of M 4.9 which occurred at Maruko town, eastern part of Nagano prefecture, at 11 h 34 m on August 24, 1986, was accompanied by foreshocks, ordinary aftershocks just after the main shock and peculiar swarm-like aftershocks that began 10 days after the event. Seismic sequences with double high adtivity peaks have occurred frequently in and around the northern Fossa Magna region; the intervals between the two peaks ranege from 13 hours to 104 days.","subitem_description_type":"Abstract"}]},"item_4_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"127751","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Tsukuda, Tameshige"}]},{"nameIdentifiers":[{"nameIdentifier":"127752","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Sakai, Kaname"}]},{"nameIdentifiers":[{"nameIdentifier":"127753","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Hashimoo, Shin'ichi"}]},{"nameIdentifiers":[{"nameIdentifier":"127754","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Haneda, Toshio"}]},{"nameIdentifiers":[{"nameIdentifier":"127755","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Kobayashi, Masaru"}]}]},"item_4_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15083/0000032814","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_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_subject_15":{"attribute_name":"日本十進分類法","attribute_value_mlt":[{"subitem_subject":"453","subitem_subject_scheme":"NDC"}]},"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":"地震研究所"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"佃, 為成"}],"nameIdentifiers":[{"nameIdentifier":"127746","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"酒井, 要"}],"nameIdentifiers":[{"nameIdentifier":"127747","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"橋本, 信一"}],"nameIdentifiers":[{"nameIdentifier":"127748","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"羽田, 敏夫"}],"nameIdentifiers":[{"nameIdentifier":"127749","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"小林, 勝"}],"nameIdentifiers":[{"nameIdentifier":"127750","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":"2017-06-26"}],"displaytype":"detail","filename":"ji0633001.pdf","filesize":[{"value":"2.0 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"ji0633001.pdf","url":"https://repository.dl.itc.u-tokyo.ac.jp/record/32814/files/ji0633001.pdf"},"version_id":"e71f0254-b6dc-4032-aebd-2394ab09fb8c"}]},"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":"長野県東部の地震(1986年,M4.9)及びそれに伴った地震群の活動特性とそのテクトニクス的意味","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"長野県東部の地震(1986年,M4.9)及びそれに伴った地震群の活動特性とそのテクトニクス的意味","subitem_title_language":"ja"}]},"item_type_id":"4","owner":"1","path":["4751","4752"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2008-05-30"},"publish_date":"2008-05-30","publish_status":"0","recid":"32814","relation_version_is_last":true,"title":["長野県東部の地震(1986年,M4.9)及びそれに伴った地震群の活動特性とそのテクトニクス的意味"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2022-12-19T05:17:28.471313+00:00"}