Publication Date:
2019
Description:
Abstract
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.
Print ISSN:
0094-8276
Electronic ISSN:
1944-8007
Topics:
Geosciences
,
Physics
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