Cyber-PSHA - Probabilistic Seismic Hazard Analysis

Host Institutions:

Ludwig-Maximilians-Universität München (LMU), Germany

Barcelona Supercomputing Center - Centro Nacional de Supercomputación (BSC CNS), Spain


CyberShake is a high-performance computing (HPC) platform to facilitate Physics-Based Probabilistic Seismic Hazard Analysis (PB-PSHA) by computing a large set of earthquake synthetic ground-motion time histories from kinematic rupture scenarios on three- dimensional finite faults. Cybershake was developed to perform PSHA studies for Southern California by the SCEC (Southern California Earthquake Center). This service aims at enabling physics-based PSHA with Cybershake for other regions of interest. Candidate institutions can propose their own use cases, i.e. regions of interest, for hazard assessment based on the feasibility and relevance of a physics-based study. BSC and LMU will offer assistance in implementing and running CyberShake on their HPC facilities to the selected proposals. The host institutions plan to provide the service with two hybrid training sessions at their HPC facilities and 6 additional months of online training.

The Cyber-Ch-PSHA Workflow, which SCEC developed, generates spectral intensity metrics for a given earthquake rupture forecast model, using a 3D physics-based seismic modeling engine. The UnifiedCSWFlow workflow manager automates several parts of a CyberShake run. CyberShake V.15.4 relies on an Anelastic Wave Propagation (AWP) open-source numerical engine.

BSC has installed CyberShake V.15.4 in its HPC facilities, together with the UnifiedCSWflow to manage the workflows, and has the experience from the RI ChEESE-1 (with the collaboration of SDSU, USC, IMO and LMU) in implementing a use case for Southern Iceland. LMU will install CyberShake V.15.4 in its computation facilities as part of the service. LMU also envisions adding SeisSol as an enhancement.

The service will be based on transnational visits and online assistance, where candidates can provide their own use cases where physics-based PSHA may provide new insights on earthquake risk. The hosts (BSC or LMU) will assist in preparing the inputs and running Cybershake for the proposed use cases. The hosts will also provide support and training in basic HPC.

Target community/Users:

Researchers with previous experience in PSHA.

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