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DTSTAMP:20190719T085744Z
LOCATION:HG E 1.2
DTSTART;TZID=Europe/Stockholm:20190613T164500
DTEND;TZID=Europe/Stockholm:20190613T171500
UID:submissions.pasc-conference.org_PASC19_sess134_msa310@linklings.com
SUMMARY:Advances in Seismic Wave Propagation Simulations on Hybrid HPC Arc
 hitectures
DESCRIPTION:Minisymposium\nSolid Earth Dynamics\n\nAdvances in Seismic Wav
 e Propagation Simulations on Hybrid HPC Architectures\n\nPeter, Lei, Orsvu
 ran, Bozdag, Tromp\n\nGlobal adjoint tomography is currently one of the mo
 st extreme examples in seismology in terms of computational requirements a
 nd big data that can potentially be assimilated in seismic inversions. Ima
 ging Earth's interior based on full-waveform inversion using the principle
 s of adjoint tomography remains a major challenge if we try to incorporate
  teleseismic signals at 1 seconds resolution. We are currently constructin
 g global mantle models with a resolution down to 17 seconds, and we aim to
  go down to approximately 9 seconds on Summit, the most powerful supercomp
 uter at Oak Ridge National Labs, with the ultimate goal to assimilate data
  from all earthquakes within the magnitude range 5.5 < Mw < 7.0. To 
 that end, we further advance the SPECFEM3D_GLOBE package, capable of model
 ing wave propagation using fully unstructured hexahedral meshes through 3D
  structures of essentially arbitrary complexity. For Summit, we see two ma
 in areas to address, i.e. (i) the optimization of both the main solver and
  the software for pre- and post-processing data analysis, and (ii) the wor
 kflow optimization. In this talk, we focus on the first point and highligh
 t advances on Summit’s Volta GPU compute nodes and present benchmark
 s of global seismic wave propagation simulations on this powerful hybrid a
 rchitecture.
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