SCEC Award Number 16247 View PDF
Proposal Category Collaborative Proposal (Integration and Theory)
Proposal Title Increasing the Efficiency of Dynamic Rupture Simulations by Concurrently Executed Forward Runs
Name Organization
Alexander Breuer University of California, San Diego Yifeng Cui University of California, San Diego
Other Participants Alexander Heinecke, Intel (external collaborator)
SCEC Priorities 3e, 4e, 6b SCEC Groups CS
Report Due Date 03/15/2017 Date Report Submitted 03/15/2017
Project Abstract
Within this project, we extended the Extreme-Scale Discontinuous Galerkin Environment (EDGE) with basic dynamic rupture capabilities and performed respective code verification benchmarks.
EDGE was initiated through the Intel Parallel Parallel Computing Center (IPCC) Accurate and Efficient Earthquake Simulations on Intel Xeon Phi.
By utilizing 612,000 Intel Xeon Phi x200 cores of Cori Phase II, we were able to sustain 10.4 PFLOPS with double-precision arithmetic, the highest ever sustained performance for a seismic simulation.
Intellectual Merit The contribution of this project is manifold:
* We integrated dynamic rupture physics to a novel computational approach, fusing multiple earthquake simulations into one execution of the forward solver.
* We discovered unphysical behavior of a scheme, used in previous efforts.
* We are planning to share additional benchmarks to avoid this in future.
Broader Impacts See introduction of report.
Exemplary Figure Figure 3: Simulation results of the TPV3 and TPV5 benchmarks at on fault receiver faultst075dp075 (strike 7.5 km, dip 7.5 km). For both benchmarks we used a fourth order wave propagation scheme in EDGE and a characteristic length of 200m at the fault. The TPV5 results are compared with results of the two codes SORD and MAFE, obtained from [16].

Credits: Alexa Breuer