Importance of Spatial Resolution in Ground Motion Simulations With 3-D Basins: An Example Using the Tangshan Earthquake

Zhang, Wenqiang1; Zhang, Zhenguo2; Fu, Haohuan3,4,5; Li, Zhengbo1; Chen, Xiaofei2

2019-11-12

10.1029/2019GL084815

GEOPHYSICAL RESEARCH LETTERS   影响因子和分区

0094-8276

1944-8007

Resonances within a sedimentary basin result in complex local seismograms. To accurately calculate complex seismograms in numerical simulations, a fine grid discretization of the basin is required. However, due to the corresponding computational expense, high-resolution simulations of realistic earthquakes with a sedimentary basin are scarce. Here, with the China's most powerful supercomputer, Sunway TaihuLight, we simulate the strong ground motion of the 1976 Tangshan earthquake with a 3-D sedimentary basin at different spatial resolutions. We find that simulations with a coarse grid not only lose high-frequency information but also distort low-frequency waveforms in locations characterized by a complex basin geometry and conflict with the traditional viewpoint that coarse-grid simulations can resolve low-frequency information. Our work emphasizes the importance of large-scale, high-resolution seismic wave simulations in complex situations.

SCI ; EI

英语

NI期刊

通讯

National Natural Science Foundation of China[41790465]

Geology

Geosciences, Multidisciplinary

WOS:000496456000001

AMER GEOPHYSICAL UNION

20194707720930

Sedimentology ; Settling tanks ; Supercomputers

Geology:481.1 ; Digital Computers and Systems:722.4

GEOSCIENCES

Web of Science

1.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei, Anhui, Peoples R China
2.Southern Univ Sci & Technol, Dept Earth & Space Sci, Shenzhen, Guangdong, Peoples R China
3.Tsinghua Univ, Key Lab Earth Syst Modeling, Minist Educ, Beijing, Peoples R China
4.Tsinghua Univ, Dept Earth Syst Sci, Beijing, Peoples R China
5.Natl Supercomp Ctr Wuxi, Wuxi, Jiangsu, Peoples R China

Zhang, Wenqiang,Zhang, Zhenguo,Fu, Haohuan,et al. Importance of Spatial Resolution in Ground Motion Simulations With 3-D Basins: An Example Using the Tangshan Earthquake[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(21):11915-11924.

Zhang, Wenqiang,Zhang, Zhenguo,Fu, Haohuan,Li, Zhengbo,&Chen, Xiaofei.(2019).Importance of Spatial Resolution in Ground Motion Simulations With 3-D Basins: An Example Using the Tangshan Earthquake.GEOPHYSICAL RESEARCH LETTERS,46(21),11915-11924.

Zhang, Wenqiang,et al."Importance of Spatial Resolution in Ground Motion Simulations With 3-D Basins: An Example Using the Tangshan Earthquake".GEOPHYSICAL RESEARCH LETTERS 46.21(2019):11915-11924.