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High-frequency Simulations of Global Seismic Wave Propagation using SPECFEM3D_GLOBE on 62K Processors

Authors:
Laura Carrington  (University of California, San Diego)
Dimitri Komatitsch  (University of Pau)
Mustafa Tikir  (University of California, San Diego)
Michael Laurenzano  (University of California, San Diego)
Allan Snavely  (University of California, San Diego)
David Michéa  (University of Pau)
Jeroen Tromp  (California Institute of Technology)
Nicolas Le Goff  (University of Pau)
ACM Gordon Bell Finalists Session
Wednesday,  03:30PM - 04:00PM
Room Ballroom G
Abstract:
SPECFEM3D_GLOBE is a spectral-element application enabling the simulation of global seismic wave propagation in 3D anelastic, anisotropic, rotating and self-gravitating Earth models at unprecedented resolution. A fundamental challenge in global seismology is to model the propagation of waves with periods between 1 and 2 seconds, the highest frequency signals that can propagate clear across the Earth. These waves help reveal the 3D structure of the Earth's deep interior and can be compared to seismographic recordings. We performed a 3D simulation reaching a shortest period of 3 seconds, setting a new record, using 12K processors of XT4 Franklin at NERSC. Final results aim to break the 2 second barrier using 62K processors of Ranger at TACC, and approach the 1 second shortest period. There will be no need to pursue smaller periods, because higher frequency signals do not propagate across the entire globe.
The full paper can be found in the IEEE Xplore Digital Library and ACM Digital Library
   IEEE Computer Society  /  ACM     2 0   Y E A R S   -   U N L E A S H I N G   T H E   P O W E R   O F   H P C