{"_buckets": {"deposit": "f7f713e8-0543-4fbc-9353-1e73da46d089"}, "_deposit": {"id": "32673", "owner": "1", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "32673"}, "status": "published"}, "_oai": {"id": "oai:repository.dl.itc.u-tokyo.ac.jp:00032673", "sets": []}, "author_link": ["126727", "126726"], "item_4_alternative_title_1": {"attribute_name": "\u305d\u306e\u4ed6\u306e\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_alternative_title": "\u6d45\u9593\u706b\u5c71\u3067\u89b3\u6e2c\u3055\u308c\u308bB\u578b\u5730\u9707\u3068\u7206\u7834\u5730\u9707\u306e\u9707\u6e90\u30e1\u30ab\u30cb\u30ba\u30e0\u3068N\u578b\u5730\u9707\u306e\u8d77\u6e90"}]}, "item_4_biblio_info_7": {"attribute_name": "\u66f8\u8a8c\u60c5\u5831", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "1990-03-15", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "2", "bibliographicPageEnd": "265", "bibliographicPageStart": "155", "bibliographicVolumeNumber": "73", "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": "B-type, explosion and N-type earthquakes recorded by short period seismographs at Asama volcano, central Japan, are analyzed. Waveforms of B-type events are gradational from a high-frequency B-type (BH-type) to a low-frequency B-type (BL-type). Medium-frequency B-type events also exist. The focal depths of BH-type events are deeper than those of BM-type and BL-type events. The low-frequency contents (1-4 Hz) which predominate in explosion and typical BL-type events are probably Rayleigh waves. We investigated a model of body-force equivalent to explain both B-type and explosion events. Six candidates were chosen for the source model of volcanic earthquakes: 1) explosive source, 2) cylindrical model, 3) tensile crack model, 4) moment tensor Mzz component, 5) vertical single force Fz, and 6) CLVD source model. Among six candidates we found that the moment tensor Mzz component was the best fit model for the 1982 April explosion event. This implies that vibrations of the explosion event were the results of both upward and downward movement of volcanic gases. For BM-type and BL-type events, we chose a cylindrical model to explain the seismograms of these events. We conclude that waveforms of both BM-type and BL-type events are excited not only by the pressure increase, but also by the pressure decrease associated with the emission of volcanic gases.", "subitem_description_type": "Abstract"}, {"subitem_description": "\u6d45\u9593\u706b\u5c71\u306e\u706b\u5c71\u6027\u5730\u9707\u306e\u89b3\u6e2c\u306f1910\u5e74\u306bOMORI(1912)\u306b\u3088\u308a\u958b\u59cb\u3055\u308c\u305f.\u6d45\u9593\u706b\u5c71\u306f\u685c\u5cf6\u706b\u5c71\u30fb\u5341\u52dd\u5cb3\u3068\u540c\u69d8\u306e\u5b89\u5c71\u5ca9\u8cea\u306e\u6d3b\u706b\u5c71\u3067\u3042\u308a,\u30d6\u30eb\u30ab\u30ce\u5f0f\u306e\u7206\u767a\u7684\u306a\u5674\u706b\u3092\u3059\u308b\u706b\u5c71\u3068\u3057\u3066\u77e5\u3089\u308c\u3066\u3044\u308b.1910\u5e74\u304b\u30891960\u5e74\u4ee3\u306e\u306f\u3058\u3081\u306b\u304b\u3051\u3066,\u6d45\u9593\u706b\u5c71\u306f\u6d3b\u767a\u306a\u5674\u706b\u6d3b\u52d5\u3092\u7e70\u308a\u8fd4\u3057\u305f.\u6700\u8fd1\u3067\u306f,1982\u5e741983\u5e74\u306b2\u56de\u306e\u5674\u706b\u6d3b\u52d5\u3092\u884c\u3063\u305f\u5f8c,\u9759\u7a4f\u306a\u72b6\u614b\u304c\u7d9a\u3044\u3066\u3044\u308b.\u6d45\u9593\u706b\u5c71\u306b\u767a\u751f\u3059\u308b\u706b\u5c71\u6027\u5730\u9707\u306f,1)\u901a\u5e38\u306e\u69cb\u9020\u6027\u306e\u5730\u9707\u306b\u6ce2\u5f62\u304c\u4f3c\u305fP\u76f8\u30fbS\u76f8\u306e\u6bd4\u8f03\u7684\u660e\u77ad\u306aA\u578b\u5730\u9707,2)\u521d\u52d5\u306e\u7acb\u3061\u4e0a\u304c\u308a\u3082,S\u76f8\u3082\u4e0d\u660e\u77ad\u3067envelope\u304c\u7d21\u9318\u5f62\u306e,\u5b89\u5c71\u5ca9\u8cea\u306e\u706b\u5c71\u306b\u7279\u5fb4\u7684\u306aB\u578b\u5730\u9707,3)5-9Hz\u306e\u6bd4\u8f03\u7684\u9ad8\u5468\u6ce2\u3067\u59cb\u307e\u308a,2-4Hz\u306emonochromatic\u306a\u6ce2\u304c\u9577\u6642\u9593\u7d99\u7d9a\u3057,\u6642\u306b\u306f\u632f\u52d5\u7d99\u7d9a\u6642\u9593\u304c10\u5206\u9593\u306b\u3082\u53ca\u3076\u3053\u3068\u306e\u3042\u308bN\u578b(T\u578b)\u5730\u9707,4)\u706b\u5c71\u306e\u7206\u767a\u306b\u4f34\u3063\u3066\u767a\u751f\u3059\u308b\u7206\u767a\u5730\u9707,5)\u706b\u5c71\u6027\u5fae\u52d5,\u306e5\u7a2e\u985e\u306b\u5927\u5225\u3055\u308c\u308b.A\u578b\u5730\u9707\u306f\u6d45\u9593\u706b\u5c71\u306e\u706b\u53e3\u306e\u897f\u5074\u5c71\u4f53\u306e\u6d77\u6c34\u9762\u4e0b1-4km\u306e\u7bc4\u56f2\u3068\u706b\u53e3\u306e\u6771\u5074\u7d042.6km\u306b\u3042\u308b\u89b3\u6e2c\u70b9SAN\u4ed8\u8fd1\u3092\u9707\u592e\u3068\u3057,\u9707\u6e90\u306e\u6df1\u3055\u304c\u6d77\u6c34\u9762\u4ed8\u8fd1\u306e\u5c71\u4f53\u306b\u767a\u751f\u3059\u308b.\u305d\u308c\u4ee5\u5916\u306e2)-5)\u306e\u706b\u5c71\u6027\u5730\u9707\u306f\u30de\u30b0\u30de\u304c\u5730\u8868\u306b\u6d41\u51fa\u3059\u308b\u7d4c\u8def\u3068\u306a\u308b\u706b\u9053\u306b\u305d\u306e\u632f\u52d5\u306e\u8d77\u6e90\u3092\u6301\u3064.MINAKAMI(1960)\u306fB\u578b\u5730\u9707\u306e\u65e5\u5225\u767a\u751f\u983b\u5ea6\u304b\u3089,\u6d45\u9593\u706b\u5c71\u306e\u5674\u706b\u306e\u78ba\u7387\u7684\u306a\u4e88\u6e2c\u3092\u884c\u3046\u4e8b\u306b\u6210\u529f\u3057\u305f.\u3053\u308c\u306f,\u6d45\u9593\u706b\u5c71\u306e\u6d3b\u52d5\u3068B\u578b\u5730\u9707\u306e\u767a\u751f\u983b\u5ea6\u3068\u306e\u76f8\u95a2\u304c\u6975\u3081\u3066\u826f\u304f,B\u578b\u5730\u9707\u306e\u767a\u751f\u983b\u5ea6\u304c\u3042\u308b\u7a0b\u5ea6\u5897\u52a0\u3059\u308b\u3068,\u6d45\u9593\u706b\u5c71\u304c\u5fc5\u305a\u5674\u706b\u3059\u308b\u3068\u3044\u3046\u5358\u7d14\u660e\u5feb\u306a\u89b3\u6e2c\u4e8b\u5b9f\u306b\u57fa\u790e\u3092\u7f6e\u3044\u3066\u3044\u308b.\u3068\u3053\u308d\u3067,\u6d45\u9593\u706b\u5c71\u30fb\u685c\u5cf6\u30fb\u5341\u52dd\u5cb3\u306eB\u578b\u5730\u9707\u306f\u4e92\u3044\u306b\u6ce2\u5f62\u306f\u826f\u304f\u4f3c\u3066\u3044\u308b.\u3057\u304b\u3057,N\u578b\u5730\u9707\u306f\u6d45\u9593\u706b\u5c71\u3068\u5341\u52dd\u5cb3\u306b\u306f\u767a\u751f\u3059\u308b\u304c,\u685c\u5cf6\u706b\u5c71\u306b\u306f\u767a\u751f\u3057\u306a\u3044.\u3053\u308c\u306fN\u578b\u5730\u9707\u306e\u767a\u751f\u304c\u706b\u5c71\u4f53\u306e\u69cb\u9020\u306b\u4f9d\u5b58\u3059\u308b\u3053\u3068\u3092\u610f\u5473\u3059\u308b.\u672c\u7814\u7a76\u3067\u306f,\u6d45\u9593\u706b\u5c71\u306e\u706b\u9053\u306b\u767a\u751f\u306e\u8d77\u6e90\u3092\u6301\u3064\u3068\u601d\u308f\u308c\u308bB\u578b\u5730\u9707\u30fbN\u578b\u5730\u9707\u30fb\u7206\u767a\u5730\u9707\u306e\u6ce2\u5f62\u89e3\u6790\u3068B\u578b\u5730\u9707\u306e\u3046\u3061\u306eBM(Medium-frequency B-type)\u3068BL(Low-frequency B-type)\u7206\u767a\u5730\u9707\u306b\u3064\u3044\u3066\u306e\u30bd\u30fc\u30b9\u30fb\u30e2\u30c7\u30eb\u306e\u691c\u8a0e\u3092\u884c\u3044,\u4ee5\u4e0b\u306e\u7d50\u8ad6\u3092\u5f97\u305f.", "subitem_description_type": "Abstract"}]}, "item_4_full_name_3": {"attribute_name": "\u8457\u8005\u5225\u540d", "attribute_value_mlt": [{"nameIdentifiers": [{"nameIdentifier": "126727", "nameIdentifierScheme": "WEKO"}], "names": [{"name": "\u6ca2\u7530, \u5b97\u4e45"}]}]}, "item_4_identifier_registration": {"attribute_name": "ID\u767b\u9332", "attribute_value_mlt": [{"subitem_identifier_reg_text": "10.15083/0000032673", "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": "\u6771\u4eac\u5927\u5b66\u5730\u9707\u7814\u7a76\u6240"}, {"subitem_text_value": "\u30e1\u30ad\u30b7\u30b3\u56fd\u7acb\u9632\u707d\u30bb\u30f3\u30bf\u30fc"}]}, "item_creator": {"attribute_name": "\u8457\u8005", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "Sawada, Munehisa"}], "nameIdentifiers": [{"nameIdentifier": "126726", "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": "ji0732001.pdf", "filesize": [{"value": "6.4 MB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_free", "mimetype": "application/pdf", "size": 6400000.0, "url": {"label": "ji0732001.pdf", "url": "https://repository.dl.itc.u-tokyo.ac.jp/record/32673/files/ji0732001.pdf"}, "version_id": "eb933aa0-e7af-4c08-8615-d688a808b541"}]}, "item_language": {"attribute_name": "\u8a00\u8a9e", "attribute_value_mlt": [{"subitem_language": "eng"}]}, "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": "The Source Mechanism of B-type and Explosion Earthquakes and the Origin of N-type Earthquakes Observed at Asama Volcano, Central Japan", "item_titles": {"attribute_name": "\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_title": "The Source Mechanism of B-type and Explosion Earthquakes and the Origin of N-type Earthquakes Observed at Asama Volcano, Central Japan", "subitem_title_language": "en"}]}, "item_type_id": "4", "owner": "1", "path": ["80/4535/4665/4669", "9/504/4538/4667/4670"], "permalink_uri": "https://doi.org/10.15083/0000032673", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2008-05-30"}, "publish_date": "2008-05-30", "publish_status": "0", "recid": "32673", "relation": {}, "relation_version_is_last": true, "title": ["The Source Mechanism of B-type and Explosion Earthquakes and the Origin of N-type Earthquakes Observed at Asama Volcano, Central Japan"], "weko_shared_id": -1}