Comprehensive investigation of earthquake damage due to the 2003 Northern Miyagi earthquake

2003年宫城北部地震震害综合调查

• 批准号: 15800009
• 负责人: MOTOSAKA Masato
• 金额: --
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Special Purposes
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 无数据
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15800009/
• 关键词: 2003 Northern Miyagi Earthquake; Asahiyama Flexure; Earthquake Damage Survey; Seismic Reflection Survey; Building Damage; Human Damage; Questionnaire Seismic Intensity Survey; Aftershock Observation; 地震災害; 地震動と被害の関係; 活断層; 変動地形調査; 震源過程

On July 26, 2003, a moderate class inland earthquake (M6.4) occurred at the shallow portion bellow the Asahiyama flexure. Ground motions recorded JMA intensity of 6 for three times in a row within a day by foreshock, main shock, and the largest aftershock. Due to this earthquake, 898 houses were totally destroyed and 2, 183 houses are partially destroyed. Liquefaction and land slides were also generated. Injured persons counted 674(seriously injured 50) and many people were forced to spend life at evacuation site.In this study, the cause of building damage, ground damage, and human damage has been investigated. Geological survey was also performed for investigating the damage in relation to the seismic fault and the shallow geological structure. As a comprehensive investigation by collaboration of various fields regarding earthquake disaster prevention, the following investigations regarding earthquake damage survey and seismic fault/crustal structure survey were performed.As for the e … More arthquake damage survey, the research achievements are described for the topics on ; 1) relation between ground motion and damage, 2) comparison study to the past earthquake damage, 3) structural and soil damage, 4) human damage and life obstruction. As one of major results, it was found from the questionnaire intensity that the seismic intensity at some locations were 7, and that structural damage decrease with the construction time of the building houses but not the case for the inner room damage.Regarding the seismic fault/crustal structure surveys, the research achievements are described for the topics on ; l) seismic fault investigation based on seismic reflection survey and topography survey, 2) shallow geological survey based on aftershock observation, 3) postseismic crustal movement observation based on GPS, 4) geological structure investigation based on strong motion observation. As one of major results, it was found from the reflection survey that the new fault with west dip was discovered at the east edge of Sue hill and its extension is consistent with the seismic fault estimated from the aftershock observation. It is concluded that the earthquake was not due to the Asahiyama flexure noticed as an active fault but the geological fault which was not approved as an active fault. Less

2003年7月26日，在旭山曲以下的浅部发生了一次中等内陆地震（M6.4）。在前震、主震和最大余震中，一天之内连续三次记录到JMA 6度的地面运动。在这次地震中，有898所房屋完全被毁，2183所房屋部分被毁。也产生了液化和滑坡。受伤人数674人（重伤50人），许多人被迫在疏散现场度过余生。本研究调查了建筑物损坏、地面损坏和人员损坏的原因。还进行了地质调查，以调查与地震断层和浅层地质结构有关的损害。作为与地震灾害预防有关的各领域合作的综合调查，进行了以下关于地震破坏调查和地震断层/地壳结构调查的调查。 ...更多信息 本文介绍了近年来我国地震震害调查的研究成果，包括：1）地震动与震害的关系，2）与以往震害的对比研究，3）结构与土的震害，4）人的破坏与生命障碍。作为主要结果之一，从调查问卷的烈度中发现，某些地点的地震烈度为7度，并且结构损坏随着建筑房屋的建造时间而减少，但内部房间的损坏情况并非如此。1）以地震反射测量和地形测量为基础的地震断层调查; 2）以余震观测为基础的浅层地质调查; 3）以GPS为基础的震后地壳运动观测; 4）以强震动观测为基础的地质构造调查。主要结果之一是反射波测量发现，在苏山东缘发现了一条新的西倾断层，其延伸范围与余震观测估计的地震断层一致。认为这次地震不是由被认为是活动断层的旭山挠曲引起的，而是由未被认为是活动断层的地质断层引起的。少

项目成果

Hiroshi Kagami: "Earthquake damage of the 2003 northern Miyagi earthquake : Comparison with damages by the historical earthquakes."Proceedings of the 2003 Northern Miyagi Earthquake Symoisium. 57-64 (2004)

Hiroshi Kagami：“2003 年宫城北部地震的地震损害：与历史地震造成的损害比较。”2003 年宫城北部地震研讨会的会议记录。

山中浩明, 元木健太郎, 駒場信彦, 上村康之, 村山雅成: "宮城県北部地震の震源域の地盤構造と地盤増幅特性について"2003年宮城県北部地震シンポジウム 資料集. 35-40 (2004)

山中弘明、本木健太郎、驹场信彦、上村泰行、村山雅成：《论宫城县北部地震震中区的地面结构及地面放大特征》2003年宫城县北部地震研讨会资料集35-40（。 2004）

源栄正人, 大野晋, 佐藤健, 落合衛, 真鍋俊平: "2003年宮城県北部の地震における面的調査に基づく震源滅の地震動と被害の関係"2003年宮城県北部地震シンポジウム資料集. 41-48 (2004)

Masato Minamoto、Susumu Ohno、Takeru Sato、Mamoru Ochiai、Shunpei Manabe：“基于 2003 年宫城县北部地震期间区域调查的地震地面运动与损害之间的关系”，2003 年宫城县北部地震研讨会资料集 41-48（2004 年）。

鏡味洋史: "2003年宮城県北部地震被害-過去の地震被害との比較-"2003年宮城県北部地震シンポジウム資料集. 57-64 (2004)

加贺美宏：“2003年宫城县北部地震灾害-与过去地震灾害的比较”2003年宫城县北部地震研讨会资料集57-64（2004年）。

源栄正人: "2003年5月26日宮城県沖の地震と2003年7月26日宮城県北部の地震における地震動と被害"日本地震工学会大会-2003梗概集. 94-95 (2003)

Masato Minamoto：“2003 年 5 月 26 日宫城县沿海地震和 2003 年 7 月 26 日宫城县沿海地震造成的地震运动和损害”，日本地震工程学会会议 - 2003 年摘要 94-95（ 2003）