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A Comparison of Earthquake Risk in the Western U.S.: Time-independent vs. Time-dependent Approaches

Although the science has shown for over a century that earthquakes are fundamentally a time-dependent process, hazard and risk analyses have generally been stuck in a time-independent framework. At CoreLogic, we have implemented time-dependent hazard and vulnerability models that provide a better assessment of the risk earthquakes pose. We will present our 2025 time-dependent earthquake model and compare it to the time-independent approach in California and the Pacific Northwest. We will show how hazard and loss change between the two models in regions of high risk, like Los Angeles, the San Francisco Bay area, and the Pacific Northwest. We also show how memory can be incorporated into vulnerability functions to better assess the cumulative damage effects of a mainshock and its subsequent aftershocks.

Session: Advancing Time-dependent PSHA and Seismic Risk Assessment: Accounting for Short- to Medium-term Clustering [Poster]

Type: Poster

Room: Exhibit Hall

Date: 4/15/2025

Presentation Time: 08:00 AM (local time)

Presenting Author: Trey Apel

Student Presenter: No

Invited Presentation: 

Poster Number: 71

Additional Authors