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Fault2SHA Learning Series: Source Models for PSHA by Graeme Weatherill
February 21 @ 2:00 PM - 3:00 PM
From Root to Branch: Preparing, Integrating and Interpreting Earthquake Data to Develop Seismic Source Models for PSHA
GFZ German Research Centre for Geosciences
Monday 21st February 2022 14:00 CET (13:00 UK, 14:00 Italy/France)
As it is currently practiced today, probabilistic seismic hazard assessment (PSHA) requires a complete description of the potential earthquakes in a region that can produce ground motions of significance at a site (or sites) interest. This includes both their physical source properties and their probability of occurrence. To develop models of the seismogenic source, we have to compile, interpret and reconcile many sources of earthquake information, including earthquake catalogues, regional-scale geology, tectonics and, of course, active faults. In this talk we will take a look at the process of seismic source model development, using examples from different PSHA studies across the globe. We will place a particular emphasis on the challenges we often face in this process, the limitations of the data, and the uncertainties we encounter along the way and how we can account for them in the seismic hazard calculations. We will also take a look at the possible directions that seismic source characterisation may take in the future and how these might influence future generations of seismic hazard models.