{"created":"2023-07-27T07:00:16.541355+00:00","id":60140,"links":{},"metadata":{"_buckets":{"deposit":"8ec5d211-0eee-4e1b-beda-3a68ed4a6d0b"},"_deposit":{"created_by":18,"id":"60140","owners":[18],"pid":{"revision_id":0,"type":"depid","value":"60140"},"status":"published"},"_oai":{"id":"oai:kanazawa-u.repo.nii.ac.jp:00060140","sets":["2812:2813:2837"]},"author_link":["49939","50486"],"item_9_biblio_info_8":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1999-03-08","bibliographicIssueDateType":"Issued"},"bibliographicPageStart":"2p.","bibliographicVolumeNumber":"1994 – 1996","bibliographic_titles":[{"bibliographic_title":"平成8(1996)年度 科学研究費補助金 基盤研究(B) 研究成果報告書概要"},{"bibliographic_title":"1996 Fiscal Year Final Research Report Summary","bibliographic_titleLang":"en"}]}]},"item_9_creator_33":{"attribute_name":"著者別表示","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{}],"nameIdentifiers":[{},{}]}]},"item_9_description_21":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"平成8年度は本研究費の最終年度にあたることより,これまでのデータ解析と当初計画で予定した観測を行った.新規観測点としてつくば(茨城県),日立大宮(茨城県)を設置した.つくば観測点では特にVAN法で問題となる人工ノイズの除去を中心に研究を行い,長さ50-100mクラスの複数短基線と長さ2km程度の長基線観測を行った.この結果,単純な東西2測線では観測開始以来9カ月で1000個を越える異常変化が検知されているものが,複数短基線の設置によりすでに50個程度の異常変化にまで絞り込むことができた.さらに平成8年11月より,長基線観測を開始したことにより,それ以降,異常変化と考えられるものは1個だけとなった.この事実は複数短基線は効果的ではあるが,それだけでは十分ではなく,長基線観測との併用こそが、真の異常を抽出するための最低条件であることを示している.また「日本では人工ノイズが多く,ギリシャで開発されたVAN法は適さない」という批判に対し、観測事実をもって答えることができたと確信する.\n平成8年3月6日に発生した山梨県東部のM5.8の地震の際には震央から約20kmの山梨県・北富士観測点で明瞭なコサイスミックな地電流変化が観測されたばかりでなく,1月29日にはSESの特徴を満たす異常変化が観測された.この北富士観測点は平成8年1月から稼働しているが,それ以降平成9年3月までこのような異常な一度も観測されていない.残念ながら当時はノイズ除去に有効な長基線観測が行われていなかったため、地震の前兆でる必要条件は満たしているが、これが真の異常であると証明されたわけではない.しかしこの研究自体には勇気を与える観測結果であった。\n平成8年8月にはこの研究の総括及び今後の発展のため,VAN法が開発されたアテネ大学物理学部を訪問し,有益な議論を行うことができた.","subitem_description_type":"Abstract"},{"subitem_description":"Whether the geoelectric potential field exhibits anomalous changes before earthquakes is a matter of long-standing debate. Recently many positive results have been reported for Greek earthquakes by the VAN group. To check their method, similar observations have been carried out in the Central Japan area. We established geoelectric potential monitoring stations at Komatsu, Suzu (Ishikawa Pref.), Toyama (Toyama Pref.), Hamaoka and Shimizu (Shizuoka Pref.), Outaki (Nagano Pref.), Kitafuji (Yamanashi Pref.), and Tsukuba and Hitachi-ohmiya (Ibaragi Pref.) during the Grant period.\nIt is generally claimed that Japan is a electrically noisy country, therefore this type of study is impossible. To overcome this opinion, we intensively installed both short and long dipoles in a same station. For example, at the Tsukuba station, we observed over thousand of anomalies for only one-pair of short dipole during nine months, however, to apply two-pairs of dipoles, the anomalies decreased only 50. Furthermore, to install 2km-long dipole, the anomaly decreased only one. It means appropriate dipole configuration works even in Japan.\nDuring our observation period, on March 6,1996, we had an M5.8 earthquake at the eastern margin of the Yamanashi Prefecture. Our Kitafuji Station locates 20km apart from the epicenter. At the Kitafuji station, we observed only one anomalous change on January 29,1996. At that moment we had not yet installed a long dipole, therefore artificial noise rejection was not well. However this observation gives us a lot of useful information.\nOn August 1996, the head investigator visited Athen University to summarize our program and discussed a future research plan.","subitem_description_type":"Abstract"}]},"item_9_description_22":{"attribute_name":"内容記述","attribute_value_mlt":[{"subitem_description":"研究課題/領域番号:06452412, 研究期間(年度):1994 – 1996","subitem_description_type":"Other"},{"subitem_description":"出典：研究課題「自然電位高密度観測による地震予知可能性の探究とその理論的メカニズムの解明」課題番号06452412\n（KAKEN：科学研究費助成事業データベース（国立情報学研究所）） \n（https://kaken.nii.ac.jp/ja/report/KAKENHI-PROJECT-06452412/064524121996kenkyu_seika_hokoku_gaiyo/）を加工して作成","subitem_description_type":"Other"}]},"item_9_description_5":{"attribute_name":"提供者所属","attribute_value_mlt":[{"subitem_description":"東海大学海洋学部","subitem_description_type":"Other"}]},"item_9_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.24517/00066391","subitem_identifier_reg_type":"JaLC"}]},"item_9_relation_28":{"attribute_name":"関連URI","attribute_value_mlt":[{"subitem_relation_name":[{"subitem_relation_name_text":"https://kaken.nii.ac.jp/search/?qm=20183890"}],"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://kaken.nii.ac.jp/search/?qm=20183890","subitem_relation_type_select":"URI"}},{"subitem_relation_name":[{"subitem_relation_name_text":"https://kaken.nii.ac.jp/ja/grant/KAKENHI-PROJECT-06452412/"}],"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://kaken.nii.ac.jp/ja/grant/KAKENHI-PROJECT-06452412/","subitem_relation_type_select":"URI"}},{"subitem_relation_name":[{"subitem_relation_name_text":"https://kaken.nii.ac.jp/ja/report/KAKENHI-PROJECT-06452412/064524121996kenkyu_seika_hokoku_gaiyo/"}],"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://kaken.nii.ac.jp/ja/report/KAKENHI-PROJECT-06452412/064524121996kenkyu_seika_hokoku_gaiyo/","subitem_relation_type_select":"URI"}}]},"item_9_version_type_25":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_ab4af688f83e57aa","subitem_version_type":"AM"}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2022-06-16"}],"displaytype":"detail","filename":"SC-PR-NAGAO-T-kaken 1999-2p.pdf","filesize":[{"value":"102.4 kB"}],"format":"application/pdf","licensetype":"license_11","mimetype":"application/pdf","url":{"label":"SC-PR-NAGAO-T-kaken 1999-2p.pdf","url":"https://kanazawa-u.repo.nii.ac.jp/record/60140/files/SC-PR-NAGAO-T-kaken 1999-2p.pdf"},"version_id":"dbfdf32d-915e-4971-aaa4-89bb740402a1"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"research report","resourceuri":"http://purl.org/coar/resource_type/c_18ws"}]},"item_title":"自然電位高密度観測による地震予知可能性の探究とその理論的メカニズムの解明","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"自然電位高密度観測による地震予知可能性の探究とその理論的メカニズムの解明"},{"subitem_title":"Study for the Possibility of Earthquake Prediction by High density Geoelectric Potential Observations and its Theoratical Approach.","subitem_title_language":"en"}]},"item_type_id":"9","owner":"18","path":["2837"],"pubdate":{"attribute_name":"公開日","attribute_value":"2022-06-16"},"publish_date":"2022-06-16","publish_status":"0","recid":"60140","relation_version_is_last":true,"title":["自然電位高密度観測による地震予知可能性の探究とその理論的メカニズムの解明"],"weko_creator_id":"18","weko_shared_id":-1},"updated":"2023-07-27T12:52:14.158093+00:00"}