{"created":"2023-03-31T02:24:17.488381+00:00","id":5362,"links":{},"metadata":{"_buckets":{"deposit":"4de50911-7581-4534-b301-d8f67959a678"},"_deposit":{"id":"5362","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"5362"},"status":"published"},"_oai":{"id":"oai:nied-repo.bosai.go.jp:00005362","sets":[]},"author_link":[],"item_10001_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1995"},"bibliographicIssueNumber":"2","bibliographicPageEnd":"89","bibliographicPageStart":"83","bibliographicVolumeNumber":"40","bibliographic_titles":[{"bibliographic_title":"火山","bibliographic_titleLang":"ja"},{"bibliographic_title":"BULLETIN OF THE VOLCANOLOGICAL SOCIETY OF JAPAN","bibliographic_titleLang":"en"}]}]},"item_10001_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"雲仙岳の火山活動に伴って発生した地震のS波コーダ部分の振幅減衰から,雲仙岳周辺のQ構造を推定した.コーダQ<sup>-1</sup>(Qc<sup>-1</sup>)は等方1次散乱近似の仮定で推定された.雲仙岳西方の地震を雲仙岳西山腹の観測点で観測した場合と,山頂直下の地震を近傍の観測点で観測した場合に,高Qc<sup>-1</sup>値が得られた.低Qc<sup>-1</sup>;値は島原半島東部の地震で得られた.また,雲仙岳東部で観測された地震も,低Qc<sup>1-</sup>値であった.不均質性と非弾性の異なる性質の2種類の媒質を仮定して,多重散乱と内部減衰による地震波の振幅減衰を,モンテカルロ法でシミュレーションした結果と,観測から推定されたQ構造との比較を行った.シミュレーションでは,地震波の振幅減衰は,強い不均質性と非弾性の領域の内部か,または,近傍で顕著になることがわかった.このことから,雲仙岳の西側及び山頂付近が,東方部分よりもより強い不均質性と非弾性を示すといえる.","subitem_description_language":"ja","subitem_description_type":"Other"},{"subitem_description":"Q-structure around Unzendake volcano, which is on the center of the Shimabara Peninsula in Kyushu, Japan, is investigated using amplitude attenuation of S-coda from earthquake records obtained during the 1991 volcanic activities. Coda-Q<sup>-1</sup>(Qc<sup>-1</sup>) value is estimated by assuming a single isotropic scattering approximation. High Qc<sup>-1</sup> values are obtained for earthquakes and stations on the western part of the volcano, and for earthquakes under the summit observed by nearby stations. Low Qc<sup>-1</sup> values are obtained for the earthquakes in the eastern Shimabara Peninsula. Qc<sup>-1</sup> values are also low for the seismograms recorded at stations to the east of the volcano. The observational results are compared with those from Monte Carlo simulation. Attenuation of seismic energy caused by multiple-scattering and intrinsic absorption is simulated assuming media having different characteristics with regard to heterogeneity and anelasticity. It is revealed that the attenuation of seismic waves is remarkable in and near the region of strong heterogeneity and anelasticity that has a high Qc<sup>-1</sup> value. It is inferred that the region comprising the western half and the summit of the volcano is characterized by stronger heterogeneity and anelasticity than those under the eastern half of the volcano.","subitem_description_language":"en","subitem_description_type":"Other"}]},"item_10001_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"特定非営利活動法人 日本火山学会","subitem_publisher_language":"ja"},{"subitem_publisher":"The Volcanological Society of Japan","subitem_publisher_language":"en"}]},"item_10001_relation_14":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"10.18940/kazan.40.2_83"}}]},"item_10001_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0453-4360","subitem_source_identifier_type":"ISSN"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"橋本 徹夫","creatorNameLang":"ja"},{"creatorName":"HASHIMOTO Tetsuo","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"山里 平","creatorNameLang":"ja"},{"creatorName":"YAMASATO Hitoshi","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"宇平 幸一","creatorNameLang":"ja"},{"creatorName":"UHIRA Kohichi","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"後藤 和彦","creatorNameLang":"ja"},{"creatorName":"GOTO Kazuhiko","creatorNameLang":"en"}]}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_title":"雲仙火山周辺で発生した地震から推定されたコーダQ<sup>-1</sup>","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"雲仙火山周辺で発生した地震から推定されたコーダQ<sup>-1</sup>","subitem_title_language":"ja"},{"subitem_title":"Coda-Q Estimated from Earthquakes around Unzendake Volcano","subitem_title_language":"en"}]},"item_type_id":"40001","owner":"1","path":["1670839190650"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2023-03-30"},"publish_date":"2023-03-30","publish_status":"0","recid":"5362","relation_version_is_last":true,"title":["雲仙火山周辺で発生した地震から推定されたコーダQ<sup>-1</sup>"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-03-31T02:24:19.199015+00:00"}