Benchmark Study of a 3d Parallel Code for the Propagation of Large Subduction Earthquakes

Authors:
Mario Chavez;Eduardo Cabrera;Raúl Madariaga;Narciso Perea;Charles Moulinec;David Emerson;Mike Ashworth;Alejandro Salazar
Affiliations:
Institute of Engineering, UNAM, C.U., Mexico DF, Mexico 04510 and Laboratoire de Géologie CNRS-ENS, Paris, France;DGSCA, UNAM, C.U., Mexico DF, Mexico 04510;Laboratoire de Géologie CNRS-ENS, Paris, France;Institute of Engineering, UNAM, C.U., Mexico DF, Mexico 04510;STFC Daresbury Laboratory, Warrington, UK WA4 4AD;STFC Daresbury Laboratory, Warrington, UK WA4 4AD;STFC Daresbury Laboratory, Warrington, UK WA4 4AD;DGSCA, UNAM, C.U., Mexico DF, Mexico 04510
Venue:
Proceedings of the 15th European PVM/MPI Users' Group Meeting on Recent Advances in Parallel Virtual Machine and Message Passing Interface
Year:
2008

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Abstract

Benchmark studies were carried out on a recently optimized parallel 3D seismic wave propagation code that uses finite differences on a staggered grid with 2ndorder operators in time and 4thorder in space. Three dual-core supercomputer platforms were used to run the parallel program using MPI. Efficiencies of 0.91 and 0.48 with 1024 cores were obtained on HECToR (UK) and KanBalam (Mexico), and 0.66 with 8192 cores on HECToR. The 3D velocity field pattern from a simulation of the 1985 Mexico earthquake (that caused the loss of up to 30000 people and about 7 billion US dollars) which has reasonable agreement with the available observations, shows coherent, well developed surface waves propagating towards Mexico City.