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From Site-specific Methods to Regional Liquefaction Hazard Mapping: Application to California

Description: 

Since the 1970s, substantial progress has been made in site-specific evaluation of liquefaction potential and its consequences, incorporating mechanics-based constraints to improve extrapolation beyond the range of available case histories. In contrast, large-scale or regional liquefaction hazard assessments have seen comparatively limited progress toward a mechanistic foundation and remain largely based on purely geospatial or statistical models.

This project develops a statewide framework for evaluating liquefaction potential, liquefaction-induced settlement, and the spatial extent of liquefaction by adapting and scaling site-specific methodologies for regional application. The approach integrates geological classification of USGS CPT datasets with a statewide groundwater table model that combines hydrologic and well observations, providing both mean estimates and uncertainty of the key inputs required for site-specific liquefaction models. In parallel, a liquefaction-extent model is developed to quantify spatial correlation length, improving the representation of liquefaction hazards at regional scale. The proposed framework is optimized for high-performance computing environments, allowing efficient evaluation of liquefaction potential and associated effects over very large spatial domains.

Session: Data-Driven Advances in Liquefaction Hazard Analysis [Poster]

Type: Poster

Date: 4/17/2026

Presentation Time: 08:00 AM (local time)

Presenting Author: Grigorios Lavrentiadis

Student Presenter: No

Invited Presentation: 

Poster Number: 24

Authors