Global Earthquake Model (GEM) Global Liquefaction Hazard Map

The Global Earthquake Model (GEM) Global Liquefaction Hazard Map (version 2026.1) shows the annualised rate of exceeding a liquefaction spatial extent (LSE) of 20% — a threshold indicative of severe surface manifestation. The map is provided at a spatial resolution of 30 arc-seconds (~ 1 km at the equator). Global seismic hazard data from the GEM Foundation (see https://hazard.openquake.org/) is integrated with geospatial liquefaction models, accounting for epistemic uncertainty to estimate global liquefaction hazard. The map is computed using the event-based calculator of the OpenQuake Engine, an open-source software for hazard and risk assessment developed by the GEM Foundation, which aggregates earthquake impacts across a set of scenarios into a long-term annualised metric.