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The main results are as follows. 1) The major aftershocks occur first and then smaller aftershocks are generated. This is the characteristics of the main shock type earthquake. 2) The major aftershocks occur in the early stage of the aftershock activity so as to satisfy Gutenberg-Richter\u0027s statistical formula which will be regulated by the principal shock. 3) Smaller aftershocks which are excited by a certain major aftershock occur so as to satisfy the statistical formula by themselves. 4) In the later stage of the aftershock development, aftershocks of intermediate size, with magnitudes around M=6 in this case, occur so as to unify the two populations of smaller earthquakes and major aftershocks to a single earthquake population governed by the principal shock. The correspondence of these characteristics to the development of the aftershock area will be studied in the accompanying paper. The existence of such regularity in the time sequence is another evidence of the fact that Gutenberg and Richter\u0027s statistical formula is a physical law and is not a probability distribution.|1968年十勝沖地震の余震においてマグニチュード別度数分布の発達にいくつかの規則性が認められる.主な結果は次の通りである.(1)主な余震が先づ発生し,次に小さい余震が発生する.これは主震型地震の特徴であろう.(2)主な余震は余震活動の早い時期に発生し,主震で規定されるところのGutenberg-Richterの統計式を満たすように起る.(3)或る主な余Uミ;こよって誘起される小さい余震は,それ自身でGutenberg-Richterの統計式を満たすように起る.(4)余震活動発達の後期において,中間的規模の地震が起り,小さい余震の母集団と主震および主な余震の母集団の2つを1つの母集団に統一するように起る.これらのマグニチュード別度数分布発達についての特徴が余震域の発達といかに対応するかという問題は次の論文にて取扱われている.マグチュード別度数分布が時間系列において,このように規則性があるということは,統計式が物理法則を表すものであって,確率分布ではたいことのもう1つの証拠であろう.", "subitem_description_type": "Abstract"}]}, "item_4_full_name_3": {"attribute_name": "著者別名", "attribute_value_mlt": [{"nameIdentifiers": [{"nameIdentifier": "129977", "nameIdentifierScheme": "WEKO"}], "names": [{"name": "南雲, 昭三郎"}]}]}, "item_4_identifier_registration": {"attribute_name": "ID登録", "attribute_value_mlt": [{"subitem_identifier_reg_text": "10.15083/0000033292", "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": "Nagumo, Shozaburo"}], "nameIdentifiers": [{"nameIdentifier": "129976", "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": "ji0485005.pdf", "filesize": [{"value": "605.6 kB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_free", "mimetype": "application/pdf", "size": 605600.0, "url": {"label": "ji0485005.pdf", "url": "https://repository.dl.itc.u-tokyo.ac.jp/record/33292/files/ji0485005.pdf"}, "version_id": "18bbf8ef-1c86-471b-832c-a40f878584a6"}]}, "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": "40. 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40. Development of the Frequency Distribution of Earthquakes with Respect to the Magnitude in the Aftershocks of the 1968 Tokachi-Oki Earthquake
https://doi.org/10.15083/0000033292
https://doi.org/10.15083/00000332922c9d0c46-798d-4a0d-a0fb-6f9b2fc6c301
名前 / ファイル | ライセンス | アクション |
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ji0485005.pdf (605.6 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 | 40. Development of the Frequency Distribution of Earthquakes with Respect to the Magnitude in the Aftershocks of the 1968 Tokachi-Oki Earthquake | |||||
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 | 10.15083/0000033292 | |||||
ID登録タイプ | JaLC | |||||
その他のタイトル | ||||||
その他のタイトル | 40. 1968年十勝沖地震余震におけるマグニチュード別度数分布の発達 | |||||
著者 |
Nagumo, Shozaburo
× Nagumo, Shozaburo |
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著者別名 | ||||||
識別子 | 129977 | |||||
識別子Scheme | WEKO | |||||
姓名 | 南雲, 昭三郎 | |||||
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 | Several regularities are revealed for the development of the freqnency distribution of aftershocks with respect to the magnitude in the 1968 Tokachi-Oki earthquake. The main results are as follows. 1) The major aftershocks occur first and then smaller aftershocks are generated. This is the characteristics of the main shock type earthquake. 2) The major aftershocks occur in the early stage of the aftershock activity so as to satisfy Gutenberg-Richter's statistical formula which will be regulated by the principal shock. 3) Smaller aftershocks which are excited by a certain major aftershock occur so as to satisfy the statistical formula by themselves. 4) In the later stage of the aftershock development, aftershocks of intermediate size, with magnitudes around M=6 in this case, occur so as to unify the two populations of smaller earthquakes and major aftershocks to a single earthquake population governed by the principal shock. The correspondence of these characteristics to the development of the aftershock area will be studied in the accompanying paper. The existence of such regularity in the time sequence is another evidence of the fact that Gutenberg and Richter's statistical formula is a physical law and is not a probability distribution.|1968年十勝沖地震の余震においてマグニチュード別度数分布の発達にいくつかの規則性が認められる.主な結果は次の通りである.(1)主な余震が先づ発生し,次に小さい余震が発生する.これは主震型地震の特徴であろう.(2)主な余震は余震活動の早い時期に発生し,主震で規定されるところのGutenberg-Richterの統計式を満たすように起る.(3)或る主な余Uミ;こよって誘起される小さい余震は,それ自身でGutenberg-Richterの統計式を満たすように起る.(4)余震活動発達の後期において,中間的規模の地震が起り,小さい余震の母集団と主震および主な余震の母集団の2つを1つの母集団に統一するように起る.これらのマグニチュード別度数分布発達についての特徴が余震域の発達といかに対応するかという問題は次の論文にて取扱われている.マグチュード別度数分布が時間系列において,このように規則性があるということは,統計式が物理法則を表すものであって,確率分布ではたいことのもう1つの証拠であろう. | |||||
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. 749-758, 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 |