Estimation of Site Effects and Seismic Attenuation (Q) Using Generalized Inversion in Southwestern Saudi Arabia: Implications for Seismic Risk Assessment
Abstract
Abstract Southwestern Saudi Arabia have historically experienced moderate to large earthquakes, highlighting the need for a detailed understanding of path attenuation and site response characteristics for effective seismic hazard assessment and mitigation. This study employs the generalized inversion technique (GIT) to estimate path attenuation and site parameters using earthquake recordings from 16 seismic stations distributed in the region with magnitude larger than 3.0. In the first step of the inversion process, observed seismograms are decomposed into source, path, and site contributions, with a reference site constraint applied to ensure consistency in spectral decomposition. The attenuation models are developed as frequency-dependent functions, yielding the following P-wave quality factors: Q P =(112±11) f^(1.04±0.16) (TATS-reference site) and Q_P=(105±7.9) f^(1.07±0.13) (DJNS-reference site).These results indicate significant seismic activity in the region, characterized by a high degree of heterogeneity in the crustal medium. This Q_f relationship suggests a low Q_O value 0.8 for tectonically and seismically active regions. In the second step, site amplification characteristics at each recording station are quantified using site spectral amplitude ratios of horizontal to vertical components. Additionally, the predominant frequency at each recording station was calculated using the generalized inversion method. The predominant frequency values obtained using TATS…
Read the paper
Related studies
- Current state and future directions for deep learning based automatic seismic fault interpretation: A systematic review
- Physics of Partially Saturated Porous Media: Residual Saturation and Seismic-Wave Propagation
- Modern Imaging Using Seismic Reflection Data
- Effects of marine seismic surveys on free-ranging fauna: a systematic literature review
- A review of the recent seismic activity in the southern part of egypt (upper egypt)
- A review of research on mechanism of seismic attenuation and energy compensation
Go deeper in Evidence Hub
Evidence Hub adds a study data sheet (design, sample size, evidence level, key numbers), an AI summary and a chat grounded in the paper's text.