Extending Kinematic Rupture Generators to Multisegment Geometries
Brendon A. Bradley, & Jake FaulknerSubmitted September 7, 2025, SCEC Contribution #14528, 2025 SCEC Annual Meeting Poster #TBD
Kinematic rupture generators are an essential component of simulation-based ground motion prediction used in probabilistic seismic hazard analysis, such as CyberShake. One important limitation of such simulation-based ground motion predictions to date has been the use of single-segment rupture geometries. This is incompatible with contemporary source models used in seismic hazard analysis with empirical ground motion predictions, which adopt multisegment rupture geometries (e.g., California and New Zealand (NZ)). In this poster, we summarize a framework to generalize single segment kinematic rupture generators to arbitrarily complex multisegment rupture geometries, particularly targeted for use in national seismic hazard model applications. The essential elements include moment partitioning between segments, direction of the rupture path from the prescribed hypocenter, and segment jumping locations and time delay. The resulting multisegment rupture generator is illustrated with various M8.5 ruptures of the Alpine Fault, NZ, that propagate northward through the Marlborough Fault Zone.
Key Words
multisegment rupture generator, Cybershake, broadband simulation
Citation
Bradley, B. A., & Faulkner, J. (2025, 09). Extending Kinematic Rupture Generators to Multisegment Geometries. Poster Presentation at 2025 SCEC Annual Meeting.
Related Projects & Working Groups
Ground Motions (GM)
