Ground-Motion Evaluation of Hybrid Seismic Velocity Models

Abstract Cost-effective strategies for enhancing seismic velocity models are an active research topic. The recently developed hybridization technique shows promise in improving used deterministic earthquake hazard evaluation. We augment the results of Ajala and Persaud (2021) by exploring other hybrid generated using 13 sets embedding parameters—taper widths subvolumes—and summarize their effect on waveform predictions up to a minimum period 2 s. Our introduce notion compatibility as consideration showing that same basin embedded into two different regional can produce notably outcomes. In contrast most our Harvard better matching ground motions, only one Southern California Earthquake Center model gives closer match waveforms. Similar obtained at higher frequencies; however, improvements due reduced. A potential explanation these may be limited high spatial frequencies travel time tomography >5–6 s wavefield-dominated adjoint models. Although strongly tapered compatible tend results, we find instances even with merging artifacts.