{"created":"2021-03-01T06:52:30.731372+00:00","id":33701,"links":{},"metadata":{"_buckets":{"deposit":"4d959dc9-c752-43e7-807e-62f96becf59c"},"_deposit":{"id":"33701","owner":"1","owners":[],"pid":{"revision_id":0,"type":"depid","value":"33701"},"status":"published"},"_oai":{"id":"oai:repository.dl.itc.u-tokyo.ac.jp:00033701","sets":["80:4535:4967:4968","9:504:4538:4969:4970"]},"author_link":["131632","131631"],"item_4_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"レーリー波の群速度にもとづいた太平洋底の分割"}]},"item_4_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1963-12-28","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"4","bibliographicPageEnd":"741","bibliographicPageStart":"719","bibliographicVolumeNumber":"41","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":"Previousely, the south-western Pacific area was divided into, four regions in each of which Rayleigh waves have the same group velocities. In the present paper, the same procedure applies for the whole Pacific area by adopting the dispersion data at many stations along abundant paths. Three regions denoted by \"\"0\"\", \"\"A\"\" and \"\"B\"\" are newly added. Special crustal conditions beneath the East Pacific Rise were confirmed.","subitem_description_type":"Abstract"},{"subitem_description":"前に西南太平洋海域について行なつたと同様の方法で,今度は全太平洋海域を,それぞれの領域中ではそれぞれレーリー波が各周期毎に同じ群速度を示すであろういくつかの領域に分けることを試みた.今まで太平洋海域で観測された多くの人達の資料中から,海水の厚さのえいきょうをあまりうけない25秒以上の周期をもつたレーリー波の群速度の値だけを用いた.結果は第8図の通りである.この分割図にもとづいて各径路上で計算されたレーリー波の群速度のほとんどが,各周期毎にそれぞれ実際に観測されたそれらと観測誤差の範囲内で一致しているから,この分割図は,ほぼ太平洋底の地殼構造の場所的な相異を第一近似的には画いているといえるだろう.この図を大観すると,1)南西部を走るいわゆる「安山岩線」の西側の部分はたしかに陸的な要素を帯びている.2)最も海洋的な地殻をもつていると思われる「O」という領域が,イースター島附近で交わる二本の帯で四分されている.そして,そのうちの南北に走る一本の帯は丁度東太平洋海嶺に当る.などの事実がうかがえる.また,この海嶺下におけるレーリー波の分散性は,第9図の「A」「B」のような曲線が予想されるが,これらの曲線から想像されるこの海嶺下の地殼構造は,海の深さの割にはうすい地殼と,その上部で普通よりもおそい地震波速度をもつたマントルで構成されたもので,このことは,屈折法による結果とも一致する.あるいは,このあたりではマントル中の低速層が,モホのすぐ下まで顔を出しているのかも知れない.","subitem_description_type":"Abstract"}]},"item_4_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"131632","nameIdentifierScheme":"WEKO"}],"names":[{"name":"三東, 哲夫"}]}]},"item_4_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15083/0000033701","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":"建築研究所国際地震工学部"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Santo, Tetsuo"}],"nameIdentifiers":[{"nameIdentifier":"131631","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":"ji0414004.pdf","filesize":[{"value":"1.3 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"ji0414004.pdf","url":"https://repository.dl.itc.u-tokyo.ac.jp/record/33701/files/ji0414004.pdf"},"version_id":"0574691a-5bc1-4716-9cfe-6cfa3b8ebe5d"}]},"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":"Division of the Pacific Area into Seven Regions in each of which Rayleigh Waves have the Same Group Velocities","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Division of the Pacific Area into Seven Regions in each of which Rayleigh Waves have the Same Group Velocities","subitem_title_language":"en"}]},"item_type_id":"4","owner":"1","path":["4968","4970"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2008-05-30"},"publish_date":"2008-05-30","publish_status":"0","recid":"33701","relation_version_is_last":true,"title":["Division of the Pacific Area into Seven Regions in each of which Rayleigh Waves have the Same Group Velocities"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2022-12-19T04:55:50.005797+00:00"}