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The main results obtained are as follows.(1)The aftershock activity one year after the main shock was still high and the number of earthquakes which are observed at the ocean-bottom seismographic station in the aftershock area with amplitudes larger than 100μkine was twenty-two earthquakes per day on the average. This activity is about three times higher than the foreshock activity.(2)Omori\u0027s coefficient K off the coast of Sanriku is about 8.6 km/sec for the earthquakes with S-P time smaller than 20 seconds.(3)The epicenter determination was performed by the two ocean-bottom seismographic stations and one land station. The length of the three stations network is about 250km.(4)The aftershocks are distributed in two groups: one is off the coast of Urakawa and the other is at the steep slope along the Japan trench.(5)The distribution of epicenters along the steep slope of the Japan trench corresponds to the boundary fault of the geophysical ocean and continent.(6)The boundary fault of the geophysical ocean and continent is tectonically active at present. Its activity seems to be one of the main causes of the genesis of the large earthquake activity in the province off the coast of Sanriku.|1968年十勝沖地震本震発生後1年経過した時点における余震活動を調べるために,1969年5月~7月にわたって約40日間,三陸沖において海底地震観測を行った.主な結果は次の通りである.", "subitem_description_type": "Abstract"}]}, "item_4_full_name_3": {"attribute_name": "著者別名", "attribute_value_mlt": [{"nameIdentifiers": [{"nameIdentifier": "129992", "nameIdentifierScheme": "WEKO"}], "names": [{"name": "南雲, 昭三郎"}]}, {"nameIdentifiers": [{"nameIdentifier": "129993", "nameIdentifierScheme": "WEKO"}], "names": [{"name": "長谷川, 周而"}]}, {"nameIdentifiers": [{"nameIdentifier": "129994", "nameIdentifierScheme": "WEKO"}], "names": [{"name": "是沢, 定之"}]}, {"nameIdentifiers": [{"nameIdentifier": "129995", "nameIdentifierScheme": "WEKO"}], "names": [{"name": "小林, 平八郎"}]}]}, "item_4_identifier_registration": {"attribute_name": "ID登録", "attribute_value_mlt": [{"subitem_identifier_reg_text": "10.15083/0000033295", "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_34": {"attribute_name": "資源タイプ", "attribute_value_mlt": [{"subitem_text_value": "Departmental Bulletin Paper"}]}, "item_4_text_4": {"attribute_name": "著者所属", "attribute_value_mlt": [{"subitem_text_value": "Earthquake Research Institute"}, {"subitem_text_value": "Graduate school, the University of Tokyo"}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "Nagumo, Shozaburo"}], "nameIdentifiers": [{"nameIdentifier": "129988", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Hasegawa, Shuji"}], "nameIdentifiers": [{"nameIdentifier": "129989", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Koresawa, Sadayuki"}], "nameIdentifiers": [{"nameIdentifier": "129990", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Kobayashi, Heihachiro"}], "nameIdentifiers": [{"nameIdentifier": "129991", "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", "download_preview_message": "", "file_order": 0, "filename": "ji0485008.pdf", "filesize": [{"value": "1.1 MB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_free", "mimetype": "application/pdf", "size": 1100000.0, "url": {"label": "ji0485008.pdf", "url": "https://repository.dl.itc.u-tokyo.ac.jp/record/33295/files/ji0485008.pdf"}, "version_id": "64d89cda-9891-4fc5-9a8d-be2ada77a198"}]}, "item_language": {"attribute_name": "言語", "attribute_value_mlt": [{"subitem_language": "eng"}]}, "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": "43. 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43. Ocean-bottom Seismographic Observation off Sanriku-Aftershock Activity of the 1968 Tokachi-Oki Earthquake and Its Relation to the Ocean-Continent Boundary Fault
https://doi.org/10.15083/0000033295
https://doi.org/10.15083/0000033295dc15183b-37de-427e-b013-6eed8e85c093
名前 / ファイル | ライセンス | アクション |
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ji0485008.pdf (1.1 MB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2008-05-30 | |||||
タイトル | ||||||
タイトル | 43. Ocean-bottom Seismographic Observation off Sanriku-Aftershock Activity of the 1968 Tokachi-Oki Earthquake and Its Relation to the Ocean-Continent Boundary Fault | |||||
言語 | en | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.15083/0000033295 | |||||
ID登録タイプ | JaLC | |||||
その他のタイトル | ||||||
その他のタイトル | 43.三陸沖における海底地震観測 : 1968年十勝沖地震の余震活動およびその海洋 : 大陸境界断層との関係 | |||||
著者 |
Nagumo, Shozaburo
× Nagumo, Shozaburo× Hasegawa, Shuji× Koresawa, Sadayuki× Kobayashi, Heihachiro |
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著者別名 | ||||||
識別子 | 129992 | |||||
識別子Scheme | WEKO | |||||
姓名 | 南雲, 昭三郎 | |||||
著者別名 | ||||||
識別子 | 129993 | |||||
識別子Scheme | WEKO | |||||
姓名 | 長谷川, 周而 | |||||
著者別名 | ||||||
識別子 | 129994 | |||||
識別子Scheme | WEKO | |||||
姓名 | 是沢, 定之 | |||||
著者別名 | ||||||
識別子 | 129995 | |||||
識別子Scheme | WEKO | |||||
姓名 | 小林, 平八郎 | |||||
著者所属 | ||||||
著者所属 | Earthquake Research Institute | |||||
著者所属 | ||||||
著者所属 | Graduate school, the University of Tokyo | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | In order to investigate the aftershock activity of'the 1968 Tokachi-Oki earthquake at the period of one year after the main shock, an oceanbottom seismographic observation was performed off the coast of Sanriku along the Japan trench in May~June of 1968. The main results obtained are as follows.(1)The aftershock activity one year after the main shock was still high and the number of earthquakes which are observed at the ocean-bottom seismographic station in the aftershock area with amplitudes larger than 100μkine was twenty-two earthquakes per day on the average. This activity is about three times higher than the foreshock activity.(2)Omori's coefficient K off the coast of Sanriku is about 8.6 km/sec for the earthquakes with S-P time smaller than 20 seconds.(3)The epicenter determination was performed by the two ocean-bottom seismographic stations and one land station. The length of the three stations network is about 250km.(4)The aftershocks are distributed in two groups: one is off the coast of Urakawa and the other is at the steep slope along the Japan trench.(5)The distribution of epicenters along the steep slope of the Japan trench corresponds to the boundary fault of the geophysical ocean and continent.(6)The boundary fault of the geophysical ocean and continent is tectonically active at present. Its activity seems to be one of the main causes of the genesis of the large earthquake activity in the province off the coast of Sanriku.|1968年十勝沖地震本震発生後1年経過した時点における余震活動を調べるために,1969年5月~7月にわたって約40日間,三陸沖において海底地震観測を行った.主な結果は次の通りである. | |||||
書誌情報 |
東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo 巻 48, 号 5, p. 793-809, 発行日 1970-12-05 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 00408972 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AN00162258 | |||||
フォーマット | ||||||
内容記述タイプ | Other | |||||
内容記述 | application/pdf | |||||
日本十進分類法 | ||||||
主題 | 453 | |||||
主題Scheme | NDC | |||||
出版者 | ||||||
出版者 | 東京大学地震研究所 | |||||
出版者別名 | ||||||
Earthquake Research Institute, University of Tokyo |