IGPP is pleased to invite you to join its Winter 2022 Seminar Series presentation featuring Louisianna State's Patricia Persaud. D. Persaud's talk, "Ground Motion Predictions near the Southern San Andreas Fault Using Hybrid Earth Models" will be available via Zoom on Tuesday, February 15, 2022, starting at 12:00pm. Zoom: https://zoom.us/j/92353183727?pwd=UGhIbTZBK2dqU0xOTDdPcW12cFhWZz09. Password: shaking
Date: Tuesday, February 22, 2022
Time: 12:00 pm, Pacific Time
Note: This meeting will be recorded. Please make sure that you are comfortable with this before registering.
Abstract: An overdue large-magnitude earthquake rupture on the southern San Andreas fault will have severe impacts for Southern California residents. Due to the lack of recent large earthquakes, seismic hazard estimates for the region are mainly based on hypothetical simulations of earthquake rupture that give estimates of the ground shaking. One of the key ingredients in such simulations is an Earth model that is representative of the real geology and rock properties. Our work improves the ground motion estimates in the region by applying newly developed approaches to update the standard Southern California Earthquake Center community velocity models used in earthquake hazard analysis by smoothly embedding basin-scale models that include explosive shots. I will present our evaluation of this new generation of hybrid Earth models in the vicinity of the southern San Andreas fault in the Salton Trough. Our methodology can be applied to other regions to rapidly and cost-effectively improve earthquake ground motion modeling efforts.