{"created":"2021-03-01T06:50:49.262095+00:00","id":32178,"links":{},"metadata":{"_buckets":{"deposit":"d006f162-0b33-49be-a443-077571396fd5"},"_deposit":{"id":"32178","owners":[],"pid":{"revision_id":0,"type":"depid","value":"32178"},"status":"published"},"_oai":{"id":"oai:repository.dl.itc.u-tokyo.ac.jp:00032178","sets":["80:4453:4471","9:504:4455:4472"]},"author_link":["71615","71616","71613","71614"],"item_4_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"Development of a Spectrogram Analysis Tool for Seismic Waveform Data and its Application to MeSO-net for Noise Survey"}]},"item_4_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2008","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"22","bibliographicPageStart":"13","bibliographicVolumeNumber":"14","bibliographic_titles":[{"bibliographic_title":"技術研究報告"}]}]},"item_4_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"We developed a spectrogram analysis tool working on Matlab to check on a seismic waveform data easily. This tool can display waveforms, power spectrum densities (PSD), and PSD spectrograms of ground motion recorded in WIN format. It can be used to evaluate a temporal variation of ground motion, and compare waveforms and spectrums for data from different channels. In this paper, we outline this tool and show its application to MeSO-net (Metropolitan Seismic Observation network) data recorded at Yayoi station (YYIM). From the analysis of whole day waveform, it is found that the noise level from AM to PM is more than ten times larger than that in the midnight because of a higher human activity, and the noise caused by train is recorded from 5 AM to 0:30 AM, which are trains’ operation hours. We then compare ground noise levels between YYIM, YYI and ASO. YYIM station is located in Tokyo University and its sensor is installed about 20m beneath the ground. The sensor at YYI is installed at the surface just beside the YYIM borehole. ASO is a permanent seismic station operated by Tokyo University, and one of the quietest sites in Kanto plain. From the analysis using this tool, YYIM (20m deep) is 10 to 20 dB quiet than YYI0 in the range more than 5 Hz, and ASO is more than 20 dB quiet than YYIM in the range lower than 20 Hz.","subitem_description_type":"Abstract"}]},"item_4_description_6":{"attribute_name":"内容記述","attribute_value_mlt":[{"subitem_description":"＜論説＞","subitem_description_type":"Other"}]},"item_4_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"71615","nameIdentifierScheme":"WEKO"}],"names":[{"name":"MIYAKAWA, Koji"}]},{"nameIdentifiers":[{"nameIdentifier":"71616","nameIdentifierScheme":"WEKO"}],"names":[{"name":"SAKAI, Shin'ichi"}]}]},"item_4_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15083/00032169","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":"AA11602838","subitem_source_identifier_type":"NCID"}]},"item_4_source_id_8":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"13426486","subitem_source_identifier_type":"ISSN"}]},"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":"東京大学地震研究所技術部総合観測室"},{"subitem_text_value":"地震地殻変動観測センター"},{"subitem_text_value":"Technical Supporting Section for Observational Research, Earthquake Research Institute"},{"subitem_text_value":"Earthquake Observation Center, Earthquake Research Institute, the University of Tokyo"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"宮川, 幸治"}],"nameIdentifiers":[{"nameIdentifier":"71613","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"酒井, 慎一"}],"nameIdentifiers":[{"nameIdentifier":"71614","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":"2017-06-12"}],"displaytype":"detail","filename":"14_013-022.pdf","filesize":[{"value":"1.3MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"14_013-022.pdf","url":"https://repository.dl.itc.u-tokyo.ac.jp/record/32178/files/14_013-022.pdf"},"version_id":"6ba801d2-b3fa-4909-993f-441354a8bafc"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"Spectrogram","subitem_subject_scheme":"Other"},{"subitem_subject":"Ground noise","subitem_subject_scheme":"Other"},{"subitem_subject":"Matlab","subitem_subject_scheme":"Other"},{"subitem_subject":"WIN format","subitem_subject_scheme":"Other"},{"subitem_subject":"MeSO-net","subitem_subject_scheme":"Other"}]},"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":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"地震波形の時間周波数解析ツールの開発 : 首都圏地震観測網（MeSO-net）構築におけるノイズ調査への適用","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"地震波形の時間周波数解析ツールの開発 : 首都圏地震観測網（MeSO-net）構築におけるノイズ調査への適用","subitem_title_language":"ja"}]},"item_type_id":"4","owner":"1","path":["4471","4472"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2017-05-15"},"publish_date":"2017-05-15","publish_status":"0","recid":"32178","relation_version_is_last":true,"title":["地震波形の時間周波数解析ツールの開発 : 首都圏地震観測網（MeSO-net）構築におけるノイズ調査への適用"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2022-12-19T05:11:09.352925+00:00"}