The OpenQuake Model Building Toolkit: A suite of tools for building components of a seismic hazard model

Marco Pagani, Kirsty Bayliss , Christopher Brooks, Kendra Johnson, Richard Styron, Manuela Villani, Yufang Rong

Building a probabilistic seismic hazard model is a complex task, requiring the integration of disparate datasets into one cohesive and comprehensive model. To facilitate this process, we have developed the OpenQuake Model Building Toolkit (OQ-MBTK), a collection of functions for constructing probabilistic seismic hazard models. This toolkit encompasses a wide array of functions essential for hazard model development, enabling users to start from catalogue and fault data and sequentially step through the model building process to produce hazard inputs compatible with the OpenQuake (OQ) Engine. These tools allow users to build seismic source models that capture epistemic uncertainty using a logic tree, select suitable ground motions for different tectonic regions, and carry out thorough sensitivity analyses. Crucially, the toolkit ensures that data are treated consistently at all stages of the process. Using the MBTK to streamline the model building workflow can ensure it is reproducible and more robust.