{"_buckets": {"deposit": "9f30157b-1626-43b6-82f8-aba149e7b057"}, "_deposit": {"id": "33062", "owner": "1", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "33062"}, "status": "published"}, "_oai": {"id": "oai:repository.dl.itc.u-tokyo.ac.jp:00033062", "sets": []}, "author_link": ["128951", "128952", "128949", "128950"], "item_4_alternative_title_1": {"attribute_name": "\u305d\u306e\u4ed6\u306e\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_alternative_title": "1978\u5e745\u6708,\u5cf6\u6839\u770c\u6771\u90e8\u306e\u5c0f\u5730\u9707(M=3.9) : \u6d3b\u52d5\u7d4c\u904e\u3068\u4e88\u6e2c\u53ef\u80fd\u6027"}]}, "item_4_biblio_info_7": {"attribute_name": "\u66f8\u8a8c\u60c5\u5831", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "1981-03-07", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "3", "bibliographicPageEnd": "633", "bibliographicPageStart": "621", "bibliographicVolumeNumber": "55", "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": "A sequence of earthquake activity occurred during May 26-29, 1978, in eastern Shimane, western part of the Honshu Island, Japan. The sequence was divided into four stages in activity; (1) foreshocks, (2) the M=3.9 main shock and its aftermaths, (3) precursory activity before the M=3.7 earthquake, and (4) the M=3.7 largest aftershock and its aftermaths. The aftershock activity of the M=3.7 event was much more active than that of the M= 3.9 event, both in number and in spatial distribution. The activity preceding the M=3.7 event was characterized by (1) a small b value, 0.4, (2) an increase in number of minor earthquakes, (3) successive increase in magnitude, and (4) the southeastward spreading of the active area, leaving a small region with no seismicity. If these had been recognized before the M= 3.7 event, we might have been able to predict the possibility of its occurrence. Although they were only two, the foreshocks of the M=3.9 event might also have suggested a subsequent major event because of (1) their occurrence in a previously inactive area, and (2) the successive increase in magnitude with a small difference (M=1.0 and 1.3). We may also admit a possible correlation between the present M=3.9 and 3.7 sequence and the M=6.1 earthquake which occurred nearby about one week later. In the hypocentral region of the M=6.1 event, the differential strain with respect to the P and T axes (namely twice as much as the shear strain on the fault plane) would have been enhanced by about 2\u00d71O-9 by the preceding M=3.9 and 3.7 events.", "subitem_description_type": "Abstract"}, {"subitem_description": 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