Microtremor Horizontal-to-Vertical Spectral Ratio (mHVSR) Data Collection at Griffith Park, 2023

Griffith Observatory is situated on the Santa Monica mountains within the Los Angeles area. This area experiences seismic activity due to its proximity to the Hollywood fault and Santa Monica faults within the LAB. In an effort to better understand the geology and also aid in future site response model development, microtremor Horizontal-to-Vertical Spectral Ratio (mHVSR) surveys were performed specifically near vertical arrays. Collaborative research between the University of Southern California (USC) and the University of California, Los Angeles (UCLA) have performed mHVSR surveys at 6 areas within the observatory park area. The HVSR spectra developed using this dataset may be accessed in the United States Community Shear-Wave Velocity (VS) Profile Database (PDB) (https://vspdb.org). This work was supported by the Sonny Astani Department of Civil and Environmental Engineering at the Viterbi School of Engineering, University of Southern California(USC).