Revisiting Paleoearthquakes with Numerical Modeling: A Case Study of the 1679 Sanhe-Pinggu Earthquake

Wang, Zijia1,2; Li, Yilong1; Wang, Wenqiang1,3; Zhang, Wenqiang; Zhang, Zhenguo1,2

2023-03-01

10.1785/0220220208

SEISMOLOGICAL RESEARCH LETTERS   Impact Factor & Quartile

0895-0695

1938-2057

Investigating a paleoearthquake in a region can be used to study the seismicity of fault zones, and provides guidance for earthquake prevention and disaster reduction in nearby cities. However, the short of reliable records brings challenges to the assessment of the paleoearthquake disasters. With the development of computational seismology, we can study paleoearthquakes using numerical modeling based on limited data, to provide a reference for understanding the physical laws of historical earthquakes and earthquake relief in present society. Taking the 1679 M 8.0 Sanhe-Pinggu earth-quake as an example, we built a dynamic model with good consistency between the surface slip and historical records, calculated the strong ground motion based on it, and obtained the intensity distribution that was consistent with the previous inves-tigation. We found that the heterogeneous dip-slip distribution caused by the fault geometry change may be the reason that the fault scarp only remains about 10 km. In addition, the intensity of Tongzhou area in this earthquake may be as high as XI. In the future, it may be necessary to pay attention to strengthening earthquake pre-vention and disaster reduction in this area. Then, we estimated the number of deaths in the study area at that time, and the mathematical expectation was of about 74,968. During the systematic retrospective study of paleoearthquakes, as shown in this article, we can gain new understandings of the rupture process of paleoearthquakes and evalu-ate earthquake disasters more accurately.

SCI

English

First ; Corresponding

National Key R&D Program of China[2017YFC1500205-01] ; National Natural Science Foundation of China["41922024","42174057"] ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)[GML2019ZD0203] ; Shenzhen Science and Technology Program[KQTD20170810111725321]

Geochemistry & Geophysics

Geochemistry & Geophysics

WOS:000944275500001

SEISMOLOGICAL SOC AMER

GEOSCIENCES

Web of Science

1.Southern Univ Sci & Technol, Dept Earth & Space Sci, Shenzhen, Peoples R China
2.Southern Marine Sci & Engn Guangdong Lab Guangzhou, Guangzhou, Peoples R China
3.McGill Univ, Dept Earth & Planetary Sci, Montreal, PQ, Canada

Wang, Zijia,Li, Yilong,Wang, Wenqiang,et al. Revisiting Paleoearthquakes with Numerical Modeling: A Case Study of the 1679 Sanhe-Pinggu Earthquake[J]. SEISMOLOGICAL RESEARCH LETTERS,2023,94(2).

Wang, Zijia,Li, Yilong,Wang, Wenqiang,Zhang, Wenqiang,&Zhang, Zhenguo.(2023).Revisiting Paleoearthquakes with Numerical Modeling: A Case Study of the 1679 Sanhe-Pinggu Earthquake.SEISMOLOGICAL RESEARCH LETTERS,94(2).

Wang, Zijia,et al."Revisiting Paleoearthquakes with Numerical Modeling: A Case Study of the 1679 Sanhe-Pinggu Earthquake".SEISMOLOGICAL RESEARCH LETTERS 94.2(2023).