{"created":"2023-07-25T10:59:43.822066+00:00","id":1465,"links":{},"metadata":{"_buckets":{"deposit":"a3bbeb58-003b-4918-9190-40caec7a3a48"},"_deposit":{"created_by":4,"id":"1465","owners":[4],"pid":{"revision_id":0,"type":"depid","value":"1465"},"status":"published"},"_oai":{"id":"oai:nipr.repo.nii.ac.jp:00001465","sets":["1:356:382"]},"author_link":["58164","1423","220","58165","58060"],"item_1_biblio_info_14":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1983-10","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"66","bibliographicPageStart":"54","bibliographicVolumeNumber":"28","bibliographic_titles":[{"bibliographic_title":"Memoirs of National Institute of Polar Research. Special issue"}]}]},"item_1_creator_8":{"attribute_name":"著者名(英)","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Shibuya, Kazuo","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Baba, Megumi","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Kienle, Juergen","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Dibble, Ray R.","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Kyle, Philip R.","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_1_description_1":{"attribute_name":"ページ属性","attribute_value_mlt":[{"subitem_description":"P(論文)","subitem_description_type":"Other"}]},"item_1_description_12":{"attribute_name":"抄録(英)","attribute_value_mlt":[{"subitem_description":"In order to monitor the long-term seismicity of Mount Erebus, Antarctica, seismic observations have been made since 1980 using radio-telemetered and local networks. The observations in the 1981-1982 field season enabled us to determine to hypocenters of 162 local events. The hypocenters can be grouped into two sets, group I with focal depths ranging from the elevation of the summit to sea level, and group II with depths ranging from sea level to 15km. The epicenters of group I earthquakes are concentrated 1 to 2.5km north-northeast of the summit crater, and have a nearly vertical focal depth distribution. They are accompanied by infrasonic signals of two distinct waveform types, which allowed the earthquakes to be classified into two sub-sets, called arbitrarily α-and β-type events. There are about twice as many α-type events than β-Type events. The epicenters of the deeper α-type events are more tightly clustered than those of the shallower β-type events. A comparison of the arrival times of the infrasonic signals with those of the seismic signals at the summit station indicates that infrasonic signals associated with α-type events may be shock waves traveling at a sound speed of around Mach 2. The shock waves may be generated at the surface of the lava lake that occupies an inner summit crater. The different character of α-and β-type infrasonic signals is probably the result of different partitioning of acoustic and seismic energies for the shallower β-type events and the somewhat deeper α-type events. The number of group Ii earthquakes is smaller by one order of magnitude compared to group I earthquakes. The hypocenters are scattered more widely and form an elongated pattern that is slightly inclined to a northeast. Group II earthquakes are not accompanied by infrasonic signals but are characterized by higher-frequency seismic signals at all stations.","subitem_description_type":"Other"}]},"item_1_source_id_13":{"attribute_name":"雑誌書誌ID","attribute_value_mlt":[{"subitem_source_identifier":"AA00733561","subitem_source_identifier_type":"NCID"}]},"item_1_text_10":{"attribute_name":"著者所属(英)","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"National Institute of Polar Research/Department of Earth Science, Faculty of Science, Chiba University/Geophysical Institute, University of Alaska/Department of Geology, Victoria University/Department of Geoscience, New Mexico Institute of Mining and Technology"}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"1983-10-01"}],"displaytype":"detail","filename":"KJ00000012098.pdf","filesize":[{"value":"1.8 MB"}],"format":"application/pdf","licensetype":"license_6","mimetype":"application/pdf","url":{"label":"KJ00000012098","url":"https://nipr.repo.nii.ac.jp/record/1465/files/KJ00000012098.pdf"},"version_id":"a98fb6b4-230c-482d-a34c-178cfaf5d422"}]},"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":"A study of the seismic and volcanic activity of Mount Erebus, Antarctica, 1981-1982","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"A study of the seismic and volcanic activity of Mount Erebus, Antarctica, 1981-1982","subitem_title_language":"en"}]},"item_type_id":"1","owner":"4","path":["382"],"pubdate":{"attribute_name":"公開日","attribute_value":"1983-10-01"},"publish_date":"1983-10-01","publish_status":"0","recid":"1465","relation_version_is_last":true,"title":["A study of the seismic and volcanic activity of Mount Erebus, Antarctica, 1981-1982"],"weko_creator_id":"4","weko_shared_id":4},"updated":"2023-07-25T13:49:25.346136+00:00"}