The first version of the hazard model for Sub-Saharan Africa (v2016.0.0) was developed by GEM in collaboration with AfricaArray within the USAID-supported SSAHARA project. The original model is extensively described in Poggi et al. (2017). Since the original version, an extended and improved version was developed (v2018.0.0) by introducing a procedure of earthquake-driven redistribution of activity rates (smoothed seismicity approach) on the previously defined source zones. Moreover, the current model includes now Madagascar, for which an ad-hoc seismicity analysis was carried out. The latest version (v2018.0.1) was used in the computation of the 2023 Global Earthquake Hazard and Risk Maps, which includes an extension of the minimum magnitude of events for crustal distributed seismicity. Differences between the different versions can be consulted in the documentation.

Coverage of Taiwan is obtained with the hazard models developed within the Taiwan Earthquake Model (TEM) initiative. The model was originally implemented for the OpenQuake engine. The original version (v2015.0.0) was used for the initial release of the 2018 Global Earthquake and Hazard and Risk Maps. Since then, an updated model (v2020.0.1) was developed in collaboration between GEM and TEM, which was used in the computation of the 2023 release of the updated Global Maps. The latest version is awating an official release to the public.

The Western Africa model (v2018.0.0) was developed internally by GEM. The model encompasses the whole Atlantic side of the Africa continent. An ad-hoc homogenised earthquake catalogue was developed based on globally available information, which was used as primary base for seismic occurrence analysis and the subsequent development of the source zonation model. The analysis was particularly challenging in the region, due to the severe incompleteness of calibration data, and the virtually nonexistent neotectonic information. Since the original version, an update was made to the model by the GEM hazard team, leading to the latest release (v2018.1.0), which was used in the computation of the 2023 Global Earthquake Hazard and Risk Maps. This model extends the minimum magnitude of events for crustal distributed seismicity and included an additional GMPE in the logic tree.