{"_buckets": {"deposit": "f5f492f3-3218-4fb6-8735-07ce1abdc170"}, "_deposit": {"id": "33119", "owner": "1", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "33119"}, "status": "published"}, "_oai": {"id": "oai:repository.dl.itc.u-tokyo.ac.jp:00033119", "sets": []}, "author_link": ["129164", "129165", "129166", "129161", "129162", "129163"], "item_4_alternative_title_1": {"attribute_name": "\u305d\u306e\u4ed6\u306e\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_alternative_title": "Explosion Earthquakes Associated with the 1973 Eruptions of Asama Volcano : (Part I) Spectral Studies"}]}, "item_4_biblio_info_7": {"attribute_name": "\u66f8\u8a8c\u60c5\u5831", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "1979-11-30", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "1", "bibliographicPageEnd": "186", "bibliographicPageStart": "161", "bibliographicVolumeNumber": "54", "bibliographic_titles": [{"bibliographic_title": "\u6771\u4eac\u5927\u5b78\u5730\u9707\u7814\u7a76\u6240\u5f59\u5831 = Bulletin of the Earthquake Research Institute, University of Tokyo"}]}]}, "item_4_description_13": {"attribute_name": "\u30d5\u30a9\u30fc\u30de\u30c3\u30c8", "attribute_value_mlt": [{"subitem_description": "application/pdf", "subitem_description_type": "Other"}]}, "item_4_description_5": {"attribute_name": "\u6284\u9332", "attribute_value_mlt": [{"subitem_description": "Asama Volcano, located in the central part of Honshu, commenced an eruption at the summit crater on Feb. 1 in 1973 after 11 years\u0027quiescence and a series of explosive eruptions continued until April 26 of the same year. The data of three component seismograms analysed in this paper were recorded by long-period seismographs (T0 = 5.0 sec) at the seismic station NAKANOSAWA located 4.2 km east of the summit crater and were registered on smoked paper recording drums at the Asama Volcano Observatory. Power spectral analyses were carried out separately, by use of the Maximum Entropy method and the Fast Fourier Transform method for both the initial parts and the later parts, of the explosion earthquakes that exceeded 1015 ergs in seismic energy. The results of the spectral studies are as follows: 1) As to the initial parts (5 sec from on-set) of seismic waves, N-S components prevail in longer periods against E-W components. 2) As to the later parts (51.2 sec after 10 sec from on-set), the results are contrary to 1). Moreover, E-W components of Feb. 1 and Mar. 10 resemble  each  other. The other components (U-D, N-S), however, are different from each other. Particularly, it should be emphasized that the maximum value of the spectrum for the U-D component is found at about 0.2 Hz on Feb. 1 but at about 0.7-1.3 Hz on Mar. 10. 3) Sweep maximum amplitudes  (or  running  diagrams)   for  E-W   components   have splittings at about 1.4-1.6 sec. 4) Predominant periods of the  initial  part of seismic waves on running  diagrams change and/or separate into other periods. As the results of these analyses, it is recognized that the explosion earthquake on Feb. 1 is different from others on the mechanism, particularly, from that on Mar. 10. In addition, it is characteristic that the spectra of the later parts for E-W components, which are in a radial direction from the summit crater, are stable in shape. It is obvious that these results give some clue to the knowledge of the mechanism of explosion earthquakes, and of eruptions.", "subitem_description_type": "Abstract"}]}, "item_4_full_name_3": {"attribute_name": "\u8457\u8005\u5225\u540d", "attribute_value_mlt": [{"nameIdentifiers": [{"nameIdentifier": "129164", "nameIdentifierScheme": "WEKO"}], "names": [{"name": "Imai, Hiroshi"}]}, {"nameIdentifiers": [{"nameIdentifier": "129165", "nameIdentifierScheme": "WEKO"}], "names": [{"name": "Gyoda, Noriya"}]}, {"nameIdentifiers": [{"nameIdentifier": "129166", "nameIdentifierScheme": "WEKO"}], "names": [{"name": "Koyama, Etsuro"}]}]}, "item_4_identifier_registration": {"attribute_name": "ID\u767b\u9332", "attribute_value_mlt": [{"subitem_identifier_reg_text": "10.15083/0000033119", "subitem_identifier_reg_type": "JaLC"}]}, "item_4_publisher_20": {"attribute_name": "\u51fa\u7248\u8005", "attribute_value_mlt": [{"subitem_publisher": "\u6771\u4eac\u5927\u5b66\u5730\u9707\u7814\u7a76\u6240"}]}, "item_4_source_id_10": {"attribute_name": "\u66f8\u8a8c\u30ec\u30b3\u30fc\u30c9ID", "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": "\u65e5\u672c\u5341\u9032\u5206\u985e\u6cd5", "attribute_value_mlt": [{"subitem_subject": "453", "subitem_subject_scheme": "NDC"}]}, "item_4_text_21": {"attribute_name": "\u51fa\u7248\u8005\u5225\u540d", "attribute_value_mlt": [{"subitem_text_value": "Earthquake Research Institute, University of Tokyo"}]}, "item_4_text_34": {"attribute_name": "\u8cc7\u6e90\u30bf\u30a4\u30d7", "attribute_value_mlt": [{"subitem_text_value": "Departmental Bulletin Paper"}]}, "item_4_text_4": {"attribute_name": "\u8457\u8005\u6240\u5c5e", "attribute_value_mlt": [{"subitem_text_value": "\u5730\u9707\u7814\u7a76\u6240"}]}, "item_creator": {"attribute_name": "\u8457\u8005", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "\u4eca\u4e95, \u535a"}], "nameIdentifiers": [{"nameIdentifier": "129161", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "\u884c\u7530, \u7d00\u4e5f"}], "nameIdentifiers": [{"nameIdentifier": "129162", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "\u5c0f\u5c71, \u60a6\u90ce"}], "nameIdentifiers": [{"nameIdentifier": "129163", "nameIdentifierScheme": "WEKO"}]}]}, "item_files": {"attribute_name": "\u30d5\u30a1\u30a4\u30eb\u60c5\u5831", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_date", "date": [{"dateType": "Available", "dateValue": "2017-06-26"}], "displaytype": "detail", "download_preview_message": "", "file_order": 0, "filename": "ji0541008.pdf", "filesize": [{"value": "1.4 MB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_free", "mimetype": "application/pdf", "size": 1400000.0, "url": {"label": "ji0541008.pdf", "url": "https://repository.dl.itc.u-tokyo.ac.jp/record/33119/files/ji0541008.pdf"}, "version_id": "17561c0f-5325-4005-8b62-52625ce6ab62"}]}, "item_language": {"attribute_name": "\u8a00\u8a9e", "attribute_value_mlt": [{"subitem_language": "jpn"}]}, "item_resource_type": {"attribute_name": "\u8cc7\u6e90\u30bf\u30a4\u30d7", "attribute_value_mlt": [{"resourcetype": "departmental bulletin paper", "resourceuri": "http://purl.org/coar/resource_type/c_6501"}]}, "item_title": "1973\u5e74\u6d45\u9593\u706b\u5c71\u5674\u706b\u306b\u4f34\u3046\u7206\u767a\u5730\u9707\u306b\u3064\u3044\u3066 : (\u7b2c1\u5831)\u30b9\u30da\u30af\u30c8\u30eb\u89e3\u6790", "item_titles": {"attribute_name": "\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_title": "1973\u5e74\u6d45\u9593\u706b\u5c71\u5674\u706b\u306b\u4f34\u3046\u7206\u767a\u5730\u9707\u306b\u3064\u3044\u3066 : (\u7b2c1\u5831)\u30b9\u30da\u30af\u30c8\u30eb\u89e3\u6790", "subitem_title_language": "ja"}]}, "item_type_id": "4", "owner": "1", "path": ["80/4535/4837/4843", "9/504/4538/4839/4844"], "permalink_uri": "https://doi.org/10.15083/0000033119", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2008-05-30"}, "publish_date": "2008-05-30", "publish_status": "0", "recid": "33119", "relation": {}, "relation_version_is_last": true, "title": ["1973\u5e74\u6d45\u9593\u706b\u5c71\u5674\u706b\u306b\u4f34\u3046\u7206\u767a\u5730\u9707\u306b\u3064\u3044\u3066 : (\u7b2c1\u5831)\u30b9\u30da\u30af\u30c8\u30eb\u89e3\u6790"], "weko_shared_id": -1}