{"_buckets": {"deposit": "3c85c1f9-1104-44de-a6e4-5cc4ec5b2c96"}, "_deposit": {"id": "32993", "owner": "1", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "32993"}, "status": "published"}, "_oai": {"id": "oai:repository.dl.itc.u-tokyo.ac.jp:00032993", "sets": []}, "author_link": ["128636", "128635"], "item_4_alternative_title_1": {"attribute_name": "\u305d\u306e\u4ed6\u306e\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_alternative_title": "1973\u5e74\u6d45\u9593\u706b\u5c71\u65ad\u7d9a\u7684\u5fae\u5674\u706b\u306b\u4f34\u3046\"\"\u5185\u88c2\"\"\u5730\u9707"}]}, "item_4_biblio_info_7": {"attribute_name": "\u66f8\u8a8c\u60c5\u5831", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "1982-09-30", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "2", "bibliographicPageEnd": "315", "bibliographicPageStart": "303", "bibliographicVolumeNumber": "57", "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": "Several successive small and gentle eruptions were observed during Feb. 16-18 in the course of the 1973 eruptive activity of Asama Volcano, central Honshu, Japan. Many earthquakes associated with the eruptions were recorded. The initial motions of some of these earthquakes were found to be downward and/or pull at all the seismic stations. These earthquakes are termed \"\"implosion earthquakes\"\". Their epicenters clustered within a small area close to the southern part of the summit crater. The depths of their origins are estimated by using some mechanical models possible for interpretation of their downward initial motions and using their onset time differences between two of the stations. Conclusively, the depths of their origins range from 0.5 to 1.5 km measured from the top of the volcano whose height is taken to 2.5 km above sea level. Judging from these results, it seems sure that the implosion earthquakes at a shallow depth in a limited area just below the summit crater of the volcano.", "subitem_description_type": "Abstract"}, {"subitem_description": 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