{"_buckets": {"deposit": "60fc3d61-0710-4b49-9a72-1863e54f5285"}, "_deposit": {"id": "33005", "owner": "1", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "33005"}, "status": "published"}, "_oai": {"id": "oai:repository.dl.itc.u-tokyo.ac.jp:00033005", "sets": []}, "author_link": ["128690", "128689"], "item_4_alternative_title_1": {"attribute_name": "\u305d\u306e\u4ed6\u306e\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_alternative_title": "1979\u5e74\u5ca9\u624b\u30fb1981\u5e74\u5bae\u57ce\u6c96\u6d25\u6ce2\u306e\u6ce2\u6e90 : \u5bae\u57ce\u6c96\u306e\u5730\u9707\u7a7a\u767d\u57df"}]}, "item_4_biblio_info_7": {"attribute_name": "\u66f8\u8a8c\u60c5\u5831", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "1982-03-31", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "4", "bibliographicPageEnd": "640", "bibliographicPageStart": "629", "bibliographicVolumeNumber": "56", "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": "Two small tsunamis generated far off Iwate on Feb. 20,1979 and off Miyagi on Jan. 19, 1981 are investigated, by using the tide-gauge records. From the amplitude-distance diagram, the magnitude (Imamura-Iida scale: m) of the 1979 and 1981 tsunamis are determined to be m = -0.5 and 0, respectively. The source area of the 1979 Iwateoki tsunami was located near the Japan Trench and the length was 50 km. The source area of the 1981 tsunami lay on the east side of the 1978 Miyagi-oki tsunami (m=0.5) and the length was 60 km in an east-west direction. These source dimensions are nearly standard for earthquakes of magnitude (M 6.5-7.0). In the space distribution of tsunami sources during the past 85 years (1897-1981), a remarkable seismic gap can be seen in a segment of 150-200 km along the trench far off Miyagi. In the southern Sanriku region, no event has occurred for at least 85 years since the earthquake of Aug. 5,1897 (M=7.7). This 1897 tsunami (m=2) caused much damage to houses with waves 2-3 meters high. A segment of 200 km far off Miyagi should be considered as an area of relatively high tsunami risk.", "subitem_description_type": "Abstract"}, {"subitem_description": 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Seismic Gap off Miyagi", "item_titles": {"attribute_name": "\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_title": "Tsunami Sources in the Sanriku Region in 1979 and 1981, Northeastern Japan : Seismic Gap off Miyagi", "subitem_title_language": "en"}]}, "item_type_id": "4", "owner": "1", "path": ["80/4535/4817/4818", "9/504/4538/4819/4820"], "permalink_uri": "https://doi.org/10.15083/0000033005", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2008-05-30"}, "publish_date": "2008-05-30", "publish_status": "0", "recid": "33005", "relation": {}, "relation_version_is_last": true, "title": ["Tsunami Sources in the Sanriku Region in 1979 and 1981, Northeastern Japan : Seismic Gap off Miyagi"], "weko_shared_id": -1}