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Earthquake Research Advances
Pub Date : 2025-01-01
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引用次数: 0
Earthquake Research Advances
Pub Date : 2025-01-01
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引用次数: 0
Earthquake Research Advances
Pub Date : 2025-01-01
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引用次数: 0
Coseismic deformation and seismogenic structure of the 2024 Hualien Earthquake measured by InSAR and GNSS 利用 InSAR 和 GNSS 测量 2024 年花莲地震的共震变形和震源结构
Earthquake Research Advances
Pub Date : 2025-01-01 DOI: 10.1016/j.eqrea.2024.100328
Jiangtao Qiu , Lingyun Ji , Liangyu Zhu , Yongsheng Li , Chuanjin Liu , Qiang Zhao
On April 3, 2024, an M7.3 earthquake occurred in the offshore area of Hualien County, Taiwan, China. The seismogenic structure at the epicentral location was highly complex, and studying this earthquake is paramount for understanding regional fault activity. In this study, we employed ascending and descending orbit Sentinel-1 Synthetic Aperture Radar (SAR) data and utilized differential interferometry (InSAR) technique to obtain the co-seismic deformation field of this event. The line-of-sight deformation field revealed that the main deformation caused by this earthquake was predominantly uplift, with maximum uplift values of approximately 38.8 ​cm and 46.1 ​cm for the ascending and descending orbits, respectively. By integrating the three-dimensional GNSS co-seismic deformation field, we identified the seismogenic fault located in the offshore thrust zone east of Hualien, trending towards the northwest. The fault geometry parameters, obtained through the inversion of an elastic half-space homogeneous model, indicated an optimal fault strike of 196°, a dip angle of 30.9°, and an average strike-slip of 0.4 ​m and dip-slip of −2.6 ​m. This suggests that the predominant motion along the seismogenic fault is thrusting. The distribution of post-seismic Coulomb stress changes revealed that aftershocks mainly occurred in stress-loaded regions. However, stress loading was observed along the northern segment of the Longitudinal Valley Fault, with fewer aftershocks. This highlights the importance of closely monitoring the seismic hazard associated with this fault segment.
2024年4月3日，中国台湾花莲县近海地区发生7.3级地震。震源位置的发震构造非常复杂，研究这次地震对了解区域断层活动具有重要意义。本文利用上升和下降轨道Sentinel-1合成孔径雷达（SAR）数据，利用差分干涉测量（InSAR）技术获得了该事件的同震变形场。视距形变场显示，此次地震引起的主要变形以抬升为主，上升轨道和下降轨道的最大抬升值分别约为38.8 cm和46.1 cm。通过对三维GNSS同震变形场的整合，确定了该发震断裂位于花莲以东的近海逆冲带，走向西北。通过弹性半空间均质模型反演得到的断层几何参数表明，最佳断层走向为196°，倾角为30.9°，平均走滑0.4 m，倾角为−2.6 m。这表明沿发震断层的主要运动是逆冲运动。震后库仑应力变化分布表明，余震主要发生在应力加载区。然而，沿纵谷断层北段观察到应力加载，余震较少。这突出了密切监测与该断层段有关的地震危险的重要性。
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引用次数: 0
Global research trends in seismic landslide: A bibliometric analysis 全球地震滑坡研究趋势：文献计量学分析
Earthquake Research Advances
Pub Date : 2025-01-01 DOI: 10.1016/j.eqrea.2024.100329
Mengjie Yang , Shenghua Cui , Tao Jiang
Earthquake-induced landslides have always been a hot research topic in the field of geosciences. However, there have been few bibliometric analyses on this topic. To systematically understand the research status, this study is based on bibliometrics and extensively uses visualization analysis techniques. It combines quantitative and qualitative methods to conduct an in-depth analysis of 5 016 papers collected from the Web of Science (www.webofscience.com). The results revealed that: ①The number of papers on earthquake-induced landslides is steadily increasing, and is expected to continue to rise. ②Countries prone to frequent earthquakes have made significant contributions to the research on earthquake-induced landslides, and the frequent and effective cooperation among these countries has had a very positive impact on promoting landslide study. ③ Research on earthquake-induced landslides is no longer limited to the field of geology, and the future direction is to integrate knowledge and technical methods from multiple disciplines. In the research methods of earthquake-induced landslides, there is a gradual shift from "experience, theory" to "data-driven". This study can provide researchers in this field with information on the core research forces, evolving hot topics, and future development trends of earthquake-induced landslides.
地震诱发滑坡一直是地学领域的研究热点。然而，关于这一主题的文献计量分析很少。为了系统地了解研究现状，本研究以文献计量学为基础，广泛使用可视化分析技术。它结合了定量和定性方法，对从Web of Science （www.webofscience.com）收集的5016篇论文进行了深入分析。结果表明：①关于地震诱发滑坡的论文数量稳步增加，并有望继续增加。②地震多发国家对地震诱发滑坡的研究做出了重要贡献，这些国家之间频繁而有效的合作对促进滑坡研究产生了非常积极的影响。③地震诱发滑坡的研究已不再局限于地质领域，未来的发展方向是多学科知识和技术方法的整合。在地震诱发滑坡的研究方法上，逐渐从“经验、理论”转向“数据驱动”。通过本研究，可以了解地震诱发滑坡的核心研究力量、发展热点和未来发展趋势。
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引用次数: 0
Earthquake Research Advances
Pub Date : 2025-01-01
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引用次数: 0
Earthquake Research Advances
Pub Date : 2025-01-01
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引用次数: 0
Earthquake Research Advances
Pub Date : 2025-01-01
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引用次数: 0
Earthquake Research Advances
Pub Date : 2025-01-01
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引用次数: 0
Earthquake Research Advances
Pub Date : 2025-01-01
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引用次数: 0
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