Welcome to the documentation for the GEM Global Seismic Hazard Mosaic! The mosaic is a collection of 36 national and regional seismic hazard models covering the entire globe. It consists of hazard models developed by various institutions, within collaborative projects, and by the GEM Foundation – all described in a consistent format compatible with the OpenQuake Engine.

Here you can find a description of every model in the Mosaic. For information on model use, see the GEM Products Page

References

Pagani, M, Garcia-Pelaez, J, Gee, R, Johnson, K, Poggi, V, Styron, R, Weatherill, G, Simionato, M, Viganò, D, Danciu, L, Monelli, D (2018). Global Earthquake Model (GEM) Seismic Hazard Map (version 2018.1 - December 2018), doi.org/10.13117/GEM-GLOBAL-SEISMIC-HAZARD-MAP-2018.1

Pagani, M, Garcia-Pelaez, J, Gee, R, Johnson, K, Silva, V, Simionato, M, Styron, R, Vigano, D, Danciu, L, Monelli, D, Poggi, V, Weatherill, G (2020). The 2018 version of the Global Earthquake Model: Hazard component. Earthquake Spectra. DOI: 10.1177/8755293020931866

Johnson, K, Villani V, Bayliss K, Brooks C, Chandrasekhar, S, Chartier, T, Chen Y, Garcia-Pelaez, J, Gee, R, Styron, R, Rood, A, Simionato, M, Pagani, M (2023). Global Earthquake Model (GEM) Seismic Hazard Map (version 2023.1 - June 2023), DOI: https://doi.org/10.5281/zenodo.8409534

Johnson, K, Villani, M, Bayliss, K, Brooks, C, Rood, A, Styron, R, Simionato, M, Pagani, M (2024) GEM's Global Seismic Hazard Mosaic: Updates since v2018, Applications, and Upcoming Activities. Proc. to the 18th World Conference on Earthquake Engineering.

Johnson K, Bayliss K, Villani M, Brooks C, Styron R, Simionato, M, Chen Y, Rood A, Pagani M (2026). Global Earthquake Model (GEM) Seismic Hazard Map (version 2026.1), DOI: https://doi.org/10.5281/zenodo.20208536