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By the dynamical equivalence of a double couple and a slip dislocation, average amount of dislocation u is obtained as u=M0/μS, where M0 is the moment of the component couple of the equivalent double couple, μ is the rigidity and S is the area of fault surface. For a fault width 20km and length 100km, u is estimated as 400cm, which agrees reasonably well with the average displacement discovered by an echo-sounding survey. The strain energy released by the formation of the fault is estimated by the use of Starr\u0027s formula as 5.0×1023erg. The energy estimated from the magnitude (M=7.5) is 1.1×1023erg. The magnitude of stress drop is estimated as 126 bars, and the corresponding strain drop 3.4×10-4.", "subitem_description_type": "Abstract"}, {"subitem_description": "時間的に階段函数であるようなdouble coupleの震源を仮定し,理論的に求めたスペクトルと実測値とを比較した.その結果,新潟地震のモーメントとして3×1027ダイン糎という値が得られた.辷り断層とdouble coupleの等価関係から,このモーメントは,断層面積と変位と剛性率の積になる.断層の長さを100粁,幅を20粁と仮定して,得られたモーメントから断層変位を求めると4米となつた.これは音響測深の結果と大体一致する.このような断層によつて解放された歪みエネルギーの値は5.0×1023エルグとなり,マグニチュード(7.5)から求められる地震波のエネルギー1.1×1023エルグと矛盾しない.更に,このような断層を生じた初期応力は126気圧,対応する歪みは3.4×10-4となり,これらの値も地表で観測された地殻変動の結果と大体一致する.", "subitem_description_type": "Abstract"}]}, "item_4_full_name_3": {"attribute_name": "著者別名", "attribute_value_mlt": [{"nameIdentifiers": [{"nameIdentifier": "131230", "nameIdentifierScheme": "WEKO"}], "names": [{"name": "安芸, 敬一"}]}]}, "item_4_identifier_registration": {"attribute_name": "ID登録", "attribute_value_mlt": [{"subitem_identifier_reg_text": "10.15083/0000033586", "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_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "Aki, Keiiti"}], "nameIdentifiers": [{"nameIdentifier": "131229", "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": "ji0441004.pdf", "filesize": [{"value": "785.2 kB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_free", "mimetype": "application/pdf", "size": 785200.0, "url": {"label": "ji0441004.pdf", "url": "https://repository.dl.itc.u-tokyo.ac.jp/record/33586/files/ji0441004.pdf"}, "version_id": "37d4d73f-7bc0-44dd-b882-9c55d2fe8489"}]}, "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": "Generation and Propagation of G Waves from the Niigata Earthquake of June 16, 1964. : Part 2. 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Generation and Propagation of G Waves from the Niigata Earthquake of June 16, 1964. : Part 2. Estimation of earthquake moment, released energy, and stress-strain drop from the G wave spectrum
https://doi.org/10.15083/0000033586
https://doi.org/10.15083/00000335865445cba9-40e7-43a3-963b-a99dfab55056
名前 / ファイル | ライセンス | アクション |
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ji0441004.pdf (785.2 kB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2009-02-18 | |||||
タイトル | ||||||
タイトル | Generation and Propagation of G Waves from the Niigata Earthquake of June 16, 1964. : Part 2. Estimation of earthquake moment, released energy, and stress-strain drop from the G wave spectrum | |||||
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 | 10.15083/0000033586 | |||||
ID登録タイプ | JaLC | |||||
その他のタイトル | ||||||
その他のタイトル | 1964年6月16日新潟地震によるG波の発生と伝播 : (2) G渡スペクトルより推定した地震モーメント,歪みエネルギーおよび初期歪みと応力 | |||||
著者 |
Aki, Keiiti
× Aki, Keiiti |
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著者別名 | ||||||
識別子 | 131230 | |||||
識別子Scheme | WEKO | |||||
姓名 | 安芸, 敬一 | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Assuming a double couple (step function in time) as the source model and comparing the theoretical spectral density of G waves obtained by Haskell, Ben-Menahem and Harkrider with the observed, we estimated the magnitude of the moment of the component couple as 3×1027 dyne cm for the Niigata earthquake. By the dynamical equivalence of a double couple and a slip dislocation, average amount of dislocation u is obtained as u=M0/μS, where M0 is the moment of the component couple of the equivalent double couple, μ is the rigidity and S is the area of fault surface. For a fault width 20km and length 100km, u is estimated as 400cm, which agrees reasonably well with the average displacement discovered by an echo-sounding survey. The strain energy released by the formation of the fault is estimated by the use of Starr's formula as 5.0×1023erg. The energy estimated from the magnitude (M=7.5) is 1.1×1023erg. The magnitude of stress drop is estimated as 126 bars, and the corresponding strain drop 3.4×10-4. | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | 時間的に階段函数であるようなdouble coupleの震源を仮定し,理論的に求めたスペクトルと実測値とを比較した.その結果,新潟地震のモーメントとして3×1027ダイン糎という値が得られた.辷り断層とdouble coupleの等価関係から,このモーメントは,断層面積と変位と剛性率の積になる.断層の長さを100粁,幅を20粁と仮定して,得られたモーメントから断層変位を求めると4米となつた.これは音響測深の結果と大体一致する.このような断層によつて解放された歪みエネルギーの値は5.0×1023エルグとなり,マグニチュード(7.5)から求められる地震波のエネルギー1.1×1023エルグと矛盾しない.更に,このような断層を生じた初期応力は126気圧,対応する歪みは3.4×10-4となり,これらの値も地表で観測された地殻変動の結果と大体一致する. | |||||
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 44, 号 1, p. 73-88, 発行日 1966-07-25 |
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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 |