{"created":"2021-03-01T06:52:36.157933+00:00","id":33780,"links":{},"metadata":{"_buckets":{"deposit":"2e95bb4c-c577-4c29-90e0-443f30d06776"},"_deposit":{"id":"33780","owner":"1","owners":[],"pid":{"revision_id":0,"type":"depid","value":"33780"},"status":"published"},"_oai":{"id":"oai:repository.dl.itc.u-tokyo.ac.jp:00033780","sets":["80:4535:4977:4981","9:504:4538:4979:4982"]},"author_link":["131859","131860","131861","131862","131855","131856","131857","131858"],"item_4_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"Aftershocks of the Northern Miyagi Earthquake, April 30, 1962, Observed at the Tsukuba Station"}]},"item_4_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1962-11-30","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"3","bibliographicPageEnd":"637","bibliographicPageStart":"625","bibliographicVolumeNumber":"40","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":"The Northern Miyagi Earthquake, which was slightly destructive around the epicentral region, occurred in the northern part of the Miyagi Prefecture, Northeastern Japan, at 02h26 m GMT, April 30th, 1962. The magnitude of the earthquake was estimated at 6.4 by the Sendai District Meteorological Observatory, Japan Meteorological Agency, and at 6.2 by the Earthquake Research Institute. Aftershocks of this earthquake were investigated on the basis of the observational data at the seismological station at Mt. Tsukuba of the Earthquake Research Institute, about 300 km distant from the epicentre. Daily numbers of earthquakes observed with the \"\"HES 1-1\"\" seismograph (Vmax≒30,000, T1 = 1.0 sec, T2 = 1.0sec) and \"\"HES 1-0.2\"\" seismsgraph (Vmax≒150,000, T1 = 1.0 sec, T2 = 0.2sec) are shown in Figs. 3 and 4, respectively. Hourly numbers and three-hourly numbers of them are shown in Figs. 4 and 5, respectively. They indicate that these seismographs recorded several hundred aftershocks of the Northern Miyagi Earthquake in a few days after the main shock. The earthquakes which were recognized as the aftershocks on the basis of the p-s time and the configuration on the \"\"HES 1-1\"\" seismograms were selected in Table 2. The magnitudes of larger aftershocks were determined directly from the Anderson-Wood seismograms. For determining the magnitude of smaller shocks which were not recorded on the Anderson-Wood seismograms, we extended the proportional relation between the two maximum trace amplitudes on the Anderson-Wood seismogram and on the \"\" HES 1-1\"\" seismogram for larger shocks. The magnitude of the main shock was estimated at slightly larger than 6.2. The two larger aftershocks had magnitudes of 5 and four had magnitudes larger than 4.5. The magnitude frequency distribution of the aftershocks is shown in Table 3. The \"\" HES 1-1\"\" seismograph was able to obtain full seismogroms of the aftershocks larger than M=3.0 and the \"\"HES 1-0.2\"\" recorded the aftershocks smaller than M=3.0 at the epicentral distance of about 300 km.","subitem_description_type":"Abstract"}]},"item_4_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"131859","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Hagiwara, Takahiro"}]},{"nameIdentifiers":[{"nameIdentifier":"131860","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Iwata, Takayuki"}]},{"nameIdentifiers":[{"nameIdentifier":"131861","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Maeda, Yoshihiro"}]},{"nameIdentifiers":[{"nameIdentifier":"131862","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Kayano, Ichiro"}]}]},"item_4_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15083/0000033780","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":"地震研究所"},{"subitem_text_value":"東京大学大学院地球物理専門課程"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"萩原, 尊礼"}],"nameIdentifiers":[{"nameIdentifier":"131855","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"岩田, 孝行"}],"nameIdentifiers":[{"nameIdentifier":"131856","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"前田, 良弘"}],"nameIdentifiers":[{"nameIdentifier":"131857","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"茅野, 一郎"}],"nameIdentifiers":[{"nameIdentifier":"131858","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":"2017-06-27"}],"displaytype":"detail","filename":"ji0403014.pdf","filesize":[{"value":"1.0 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"ji0403014.pdf","url":"https://repository.dl.itc.u-tokyo.ac.jp/record/33780/files/ji0403014.pdf"},"version_id":"4aeafaee-eebb-4c26-a984-6592f33ff43b"}]},"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":"筑波山で観測された1962年4月30日宮城県北部地震の余震","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"筑波山で観測された1962年4月30日宮城県北部地震の余震","subitem_title_language":"ja"}]},"item_type_id":"4","owner":"1","path":["4981","4982"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2009-10-13"},"publish_date":"2009-10-13","publish_status":"0","recid":"33780","relation_version_is_last":true,"title":["筑波山で観測された1962年4月30日宮城県北部地震の余震"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2022-12-19T04:08:59.669578+00:00"}