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According to JMA, the epicenter of the main shock was at 42°42\u0027N, 147°37\u0027E, with a depth of 30km and the earthquake magnitude 7.8. Tsunami height observed at the coast of eastern Hakkaido was the largest among tsunamis generated recently in the vicinity of the South Kuril Islands. At Hanasaki, the maximum height of 1.5 m was recorded. Waveheights in northeastern and southwestern Japan are in the ranges of 40~60 cm and 20~30 cm, respectively. The initial motion of the tsunami was in an upward direction at most stations, but at Hanasaki, the initial disturbance began with a conspicuous downward motion, suggesting the subsidence of the sea bottom in a part of the tsunami source. The source area estimated by means of an inverse refraction diagram lies on the continental slope, extending about 170km parallel to the Kuril Arc. Judging from the attenuation of the initial wave height with distance, the total wave energy seems to be equal to that of the 1958 Iturup tsunami. The predominant period of tsunami incident to the shelf is inferred to be about 30min by comparing the spectrum of tsunami with that of the records at the ordinary time near Miyagi-Enoshima.|1969年8月12日6時28分(JST),北海道色丹島沖の地震に伴ない津波が発生した.気象庁の地震月報によると,震央は42°42\u0027N,147°37\u0027E,深さ30km,地震のマグニチュードはM=7.8である.この津波は,本震が起った約30分以後から各地の検潮所で観測された.津波の第1波は,本州とオホーツク海に面した北海道沿岸では押し波で始まつた.しかし,波源に近い花咲では明瞭な引き波が記録され,波源域の1部分が沈降したことを暗示している.各地の津波の到達時間をもとにして作図した逆伝播図によると,津波の波源域は色丹島沖合の水深2000~4000mの陸棚斜面上にあつて,等深線に沿つて伸び,その大きさは約170kmと推定される.この程度の規模を持つ浅い地震に対して,この推定値は統計的に標準の大きさである.なお,推定源域は余震域とほぼ合致した位置にある.", "subitem_description_type": "Abstract"}]}, "item_4_full_name_3": {"attribute_name": "著者別名", "attribute_value_mlt": [{"nameIdentifiers": [{"nameIdentifier": "130076", "nameIdentifierScheme": "WEKO"}], "names": [{"name": "羽鳥, 徳太郎"}]}]}, "item_4_identifier_registration": {"attribute_name": "ID登録", "attribute_value_mlt": [{"subitem_identifier_reg_text": "10.15083/0000033316", "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"}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "Hatori, Tokutaro"}], "nameIdentifiers": [{"nameIdentifier": "130075", "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": "ji0483004.pdf", "filesize": [{"value": "940.2 kB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_free", "mimetype": "application/pdf", "size": 940200.0, "url": {"label": "ji0483004.pdf", "url": "https://repository.dl.itc.u-tokyo.ac.jp/record/33316/files/ji0483004.pdf"}, "version_id": "be24f363-6d22-49f9-8a76-403e87903486"}]}, "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": "24. 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24. An Investigation of the Tsunami generated by the East Hokkaido Earthquake of August, 1969
https://doi.org/10.15083/0000033316
https://doi.org/10.15083/000003331640780edb-01ef-4a5b-b8d4-4f5126dda656
名前 / ファイル | ライセンス | アクション |
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ji0483004.pdf (940.2 kB)
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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 | 24. An Investigation of the Tsunami generated by the East Hokkaido Earthquake of August, 1969 | |||||
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 | 10.15083/0000033316 | |||||
ID登録タイプ | JaLC | |||||
その他のタイトル | ||||||
その他のタイトル | 24. 1969年8月北海道東方沖地震による津波 | |||||
著者 |
Hatori, Tokutaro
× Hatori, Tokutaro |
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著者別名 | ||||||
識別子 | 130076 | |||||
識別子Scheme | WEKO | |||||
姓名 | 羽鳥, 徳太郎 | |||||
著者所属 | ||||||
著者所属 | Earthquake Research Institute | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | A tsunami was generated off Shikotan Island, in eastern Hokkaido, at 21 h 28m (GMT) on August 11, 1969. According to JMA, the epicenter of the main shock was at 42°42'N, 147°37'E, with a depth of 30km and the earthquake magnitude 7.8. Tsunami height observed at the coast of eastern Hakkaido was the largest among tsunamis generated recently in the vicinity of the South Kuril Islands. At Hanasaki, the maximum height of 1.5 m was recorded. Waveheights in northeastern and southwestern Japan are in the ranges of 40~60 cm and 20~30 cm, respectively. The initial motion of the tsunami was in an upward direction at most stations, but at Hanasaki, the initial disturbance began with a conspicuous downward motion, suggesting the subsidence of the sea bottom in a part of the tsunami source. The source area estimated by means of an inverse refraction diagram lies on the continental slope, extending about 170km parallel to the Kuril Arc. Judging from the attenuation of the initial wave height with distance, the total wave energy seems to be equal to that of the 1958 Iturup tsunami. The predominant period of tsunami incident to the shelf is inferred to be about 30min by comparing the spectrum of tsunami with that of the records at the ordinary time near Miyagi-Enoshima.|1969年8月12日6時28分(JST),北海道色丹島沖の地震に伴ない津波が発生した.気象庁の地震月報によると,震央は42°42'N,147°37'E,深さ30km,地震のマグニチュードはM=7.8である.この津波は,本震が起った約30分以後から各地の検潮所で観測された.津波の第1波は,本州とオホーツク海に面した北海道沿岸では押し波で始まつた.しかし,波源に近い花咲では明瞭な引き波が記録され,波源域の1部分が沈降したことを暗示している.各地の津波の到達時間をもとにして作図した逆伝播図によると,津波の波源域は色丹島沖合の水深2000~4000mの陸棚斜面上にあつて,等深線に沿つて伸び,その大きさは約170kmと推定される.この程度の規模を持つ浅い地震に対して,この推定値は統計的に標準の大きさである.なお,推定源域は余震域とほぼ合致した位置にある. | |||||
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 3, p. 399-412, 発行日 1970-08-31 |
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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 |