2018年日本北海道胆振东部<i>M<sub>W</sub></i>6.6地震运动学震源模型

doi:10.3799/dqkx.2025.171

2018年日本北海道胆振东部M_W6.6地震运动学震源模型

doi: 10.3799/dqkx.2025.171

吴双兰^1,2,
李涵¹,
崔臻³,
野津厚⁴,
庄海洋^1,5,
赵凯¹,
陈国兴^1, ,

1. 南京工业大学岩土工程研究所, 江苏南京 211816;
2. 东南大学南通海洋高等研究院, 江苏南通 226010;
3. 中国科学院武汉岩土力学研究所, 湖北武汉 430071;
4. 港湾空港技术研究所, 日本神奈川 2390826;
5. 华东交通大学土木建筑学院, 江西南昌 330013

基金项目:

江苏省“双创博士”计划项目(JSSCBS20230124)

中国地震局工程力学研究所基本科研业务费专项资助项目(2023D10)

国家自然科学基金(52278503,52378397,52379112)

国家重点研发计划项目(2023YFB2390400)联合资助

详细信息

作者简介:
吴双兰，女，1987年生，2018年毕业于日本京都大学，副教授，主要从事运动学的震源机制反演、强震动场模拟、岩土地震工程等方面研究.E-mail:wushuang7850@163.com.

通讯作者:
陈国兴，男，1963年生，1993年毕业于中国地震局工程力学研究所，教授，主要从事强震动场模拟、岩土地震工程、土动力学等方面研究.E-mail:gxc6307@163.com.

中图分类号: P315
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出版历程
- 收稿日期: 2025-05-27
- 网络出版日期: 2025-09-08

Kinematic source model of the 2018 Hokkaido Eastern Iburi M_W6.6 Japan Earthquake

1. Institute of Geotechnical Engineering, Nanjing Tech University, Nanjing 210009, China;
2. Advanced Ocean Institute of Southeast University Nantong, Nantong 226010, China;
3, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China;
4. Port and Airport Research Institute, Kanagawa 2390826, Japan;
5. School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, China

摘要

摘要: 通过观测的地表波形反演震源机制以理解地震震源破裂过程是研究强震动特征非常有效的途径之一.本研究主要针对强震动的产生机制，采用中小震作为经验格林函数，选取 0.2～2.0 Hz 频段的强震动速度波形进行波形反演 2018年日本北海道M_W6.6地震的破裂过程，提出了该地震的震源模型.结果表明：该地震的主要最大滑移量区域集中在沿断层面西南部～东北部6 km范围、距离震源～12.0 km 的浅层区域内，该区域内最大滑动量约 3.5 m；识别出两个最大滑移速度分布区，分别位于断层西南6.0 km、东北4.0 km，距离震源～15.0 km 的浅层区域内，最大滑动速度约 2.0 m/s，破裂速度为 2.0 km/s，该震源模型对应地震震级M_W7.0.此外，本研究通过多种组合的中小震记录作为经验的格林函数及近断层强震观测台站探讨了该震源模型的鲁棒性，进一步通过合成未参与反演的台站强震动波形，结果显示合成波形与观测波形的匹配度较高，表明模型的时空特征描述合理；最后，通过与其他公开已发表的震源模型的综合对比发现最大滑移分布相似，该系列对比充分验证了该震源模型是稳定可靠的，可为未来强震动模拟提供重要参考.
- 2018年日本北海道胆振东部地震 /
- 运动学震源模型 /
- 波形反演 /
- 经验的格林函数 /
- 强震动波形
Abstract: Conducting waveform inversions to estimate the rupture process of media to large size of earthquakes is one of the effective methods to better understand the characteristics of strong ground motions. Aimed at investigating the generation mechanism of strong ground motions, this study evaluated the rupture process of the 2018 Hokkaido, Japan, earthquake through waveform inversion based on the corrected empirical Green’s functions. It illustrated that, large slip regions are concentrated along the shallow southwestern- to northeastern-section of the fault around 6.0 km. Within this region, the maximum final slip approximated to 3.5 m; two peak slip velocity regions were identified, the primary one was located 6.0 km southwestern, and the secondary one was located 4.0 km northeastern, and both are 15.0 km shallower of the hypocenter. The maximum peak slip velocity is about 2.0 m/s. A rupture velocity of 2.0 km/s was identified, and the inverted source model corresponded to a magnitude M_W7.0. Furthermore, another 3 waveform inversions using different combination of empirical Green’s functions and additional 7 different combinations of near-fault strong motion stations were operated to investigate the robustness and reliability of the source model. Based on the evaluated source model, additional strong motions at stations, which were not used in the waveform inversion, were synthesized and the synthesized and observed velocities could consist well. Similarities of the final slip distribution among different source models also could be obtained. All these results demonstrated that, the major spatiotemporal characteristics of slip is robust and reliable, which could offer useful information for future strong motion simulation and analysis.
- 2018 Hokkaido Eastern Iburi Earthquake /
- kinematic source model /
- waveform inversion /
- empirical Green's functions /
- strong-ground motion waveform

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参考文献(44)

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2018年日本北海道胆振东部M_W6.6地震运动学震源模型

doi: 10.3799/dqkx.2025.171

作者简介:
吴双兰，女，1987年生，2018年毕业于日本京都大学，副教授，主要从事运动学的震源机制反演、强震动场模拟、岩土地震工程等方面研究.E-mail:wushuang7850@163.com.

通讯作者:
陈国兴，男，1963年生，1993年毕业于中国地震局工程力学研究所，教授，主要从事强震动场模拟、岩土地震工程、土动力学等方面研究.E-mail:gxc6307@163.com.

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Kinematic source model of the 2018 Hokkaido Eastern Iburi M_W6.6 Japan Earthquake

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目录

留言板

2018年日本北海道胆振东部MW6.6地震运动学震源模型

doi: 10.3799/dqkx.2025.171

作者简介: 吴双兰，女，1987年生，2018年毕业于日本京都大学，副教授，主要从事运动学的震源机制反演、强震动场模拟、岩土地震工程等方面研究.E-mail:wushuang7850@163.com.

通讯作者: 陈国兴，男，1963年生，1993年毕业于中国地震局工程力学研究所，教授，主要从事强震动场模拟、岩土地震工程、土动力学等方面研究.E-mail:gxc6307@163.com.

计量

出版历程

Kinematic source model of the 2018 Hokkaido Eastern Iburi MW6.6 Japan Earthquake

计量

出版历程

目录

2018年日本北海道胆振东部M_W6.6地震运动学震源模型

作者简介:
吴双兰，女，1987年生，2018年毕业于日本京都大学，副教授，主要从事运动学的震源机制反演、强震动场模拟、岩土地震工程等方面研究.E-mail:wushuang7850@163.com.

通讯作者:
陈国兴，男，1963年生，1993年毕业于中国地震局工程力学研究所，教授，主要从事强震动场模拟、岩土地震工程、土动力学等方面研究.E-mail:gxc6307@163.com.

Kinematic source model of the 2018 Hokkaido Eastern Iburi M_W6.6 Japan Earthquake