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Do the Two Seismic Gaps in the SouthwesternSection of the Longmen Shan Fault Presentthe Same Seismic Hazard?
Chang Liu1; Zhu BJ(朱伯靖)2; Yaolin Shi3
发表期刊Journal Geophysical Research Solid Earth
2020-03
卷号125期号:3页码:1-23
DOI10.1029/2019JB018160
产权排序第2完成单位
收录类别SCIE
摘要

There are two seismic gaps in the southwestern section of the Longmen Shan Fault (LMSF): (1) the gap amid the ruptures of the 2008 Wenchuan and 2013 Lushan earthquakes and (2) the gap in the southwestern‐most section of the LMSF. Conflicting explanations have previously been proposed to estimate the hazards associated with these seismic gaps. In this study, we used a complete earthquake (M ≥ 6.0) catalogue for the past 300 years to re‐evaluate the seismic hazards by calculating the change in the Coulomb stress caused by nearby large earthquakes. When combined with the inter‐seismic tectonic stress loading process, our results suggest that there is a high possibility of a future earthquake in seismic gap 1 because of the enhanced stress caused by the 2008 Wenchuan and 2013 Lushan earthquakes, although the 1970 Dayi earthquake (Ms 6.2) did rupture the center of the gap. However, the risk of an earthquake occurring in seismic gap 2 has decreased due to the unloading stress triggered by 14 large historical earthquakes on the Xianshui He Fault. This indicates that the seismic hazards of the two gaps differ even though they are less than 35 km apart. These findings differ from the results of previous studies, which were obtained using earthquake‐induced stress modeling, inter‐seismic stress modeling, estimates of earthquake moment accumulation and release, and paleoearthquake analysis. Our research sheds new insights on seismic hazard estimates for the southwestern LMSF and might be helpful in determining the disaster relief distribution in Sichuan province, China.

语种英语
学科领域计算物理学 ; 地球科学
学科门类理学::物理学 ; 理学::地球物理学
出版地https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2019JB018160
引用统计
被引频次:16[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/22563
专题太阳物理研究组
通讯作者Chang Liu
作者单位1.State Key Laboratory of Marine Geology, Tongji University, Shanghai, China
2.Yunnan Observatories, Chinese Academy of Sciences, Kunming, China
3.Key Laboratory of Computational Geodynamics, Chinese Academy of Sciences, Beijing, China
推荐引用方式
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Chang Liu,Zhu BJ,Yaolin Shi. Do the Two Seismic Gaps in the SouthwesternSection of the Longmen Shan Fault Presentthe Same Seismic Hazard?[J]. Journal Geophysical Research Solid Earth,2020,125(3):1-23.
APA Chang Liu,Zhu BJ,&Yaolin Shi.(2020).Do the Two Seismic Gaps in the SouthwesternSection of the Longmen Shan Fault Presentthe Same Seismic Hazard?.Journal Geophysical Research Solid Earth,125(3),1-23.
MLA Chang Liu,et al."Do the Two Seismic Gaps in the SouthwesternSection of the Longmen Shan Fault Presentthe Same Seismic Hazard?".Journal Geophysical Research Solid Earth 125.3(2020):1-23.
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