Conveners: Terry Tullis
Dates: September 8, 2013 (13:00-17:00)
Location: Hilton Palm Springs Resort, Palm Springs, CA
SCEC Award and Report: 13101

SUMMARY: This workshop was intended both for those who are participating in the SCEC Collaborative Project on Comparison, Verification, and Validation of Earthquake Simulators and for those with general interest in the topic. We looked at the status of our comparisons on two problems that we are presently working on and considered the future of a coordinated effort on earthquake simulators. The two problems under investigation are (1) jumping of ruptures from one fault to another, and (2) many-fault simulated earthquake histories based on the UCERF3 deformation model(s). For the first of these problems we are both determining how far ruptures can jump from one fault to another using the simulators as as they currently exist (which seems to be less than observed ruptures) and what modifications represent the best approach to make them jump more realistic distances. Comparisons are being made with results for the same problem that is being investigated by the dynamic rupture modeling Technical Activity Group (TAG). For simulations using UCERF3 models, issues include settling on the best approach to assigning stress-drop values for all of the fault sections and how many of the UCERF3 deformation models should be used as input. Looking forward, it is clear that studying the behavior of earthquake simulators can provide valuable insights into the behavior of actual earthquake interactions and sequences and the character of earthquake catalogs. What needs to be determined is the best way to study this within SCEC, and in particular, whether a collaborative project and TAG as has existed for the past several years is the best approach.

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SEPTEMBER 8, 2013

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