Abstract

Site amplification in the Salt Lake Valley, Utah, has been a focus for both geologists and engineers due to its complex geology and seismic vulnerability. This study utilizes data from the 2020 Magna Earthquake to analyze site amplification from previously unavailable strong ground motion data. Ground motion data from the University of Utah Regional Seismic Network and the National Strong Motion Project, combined with extensive soil profiles, was analyzed using the program DEEPSOIL. The study compares computed motions with measured motions, revealing differences in site amplification across the Salt Lake Valley. Notably, the highest amplification was observed at longer periods in areas with greater soil-to-bedrock depth, while shallower sites showed heightened amplification at shorter periods. High amplification was measured at multiple sites around the valley at longer periods that we were not able to account for in our computations. Challenges in achieving alignment between computed and measured motions highlight the importance of refining site response analysis in this area. The findings from this study contribute to a better understanding of seismic hazards in the Salt Lake Valley, aiding in the development of seismic hazard mitigation strategies for this critical region.

Degree

College and Department

Ira A. Fulton College of Engineering; Civil and Environmental Engineering

Rights

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