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3D frequency-domain seismic modeling with a Parallel BLR multifrontal direct solver

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Academic year: 2021

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Figure 1: A front before (a) and after (b) partial factorization. tional and memory requirements for the complete factorization strongly depend on how the fronts are formed and on the order in which they are processed
Figure 2: Illustration of tree and node parallelism. The shaded part of each front represents its fully-summed rows
Figure 3: Scalability of the factorization for the 7Hz frequency. For BLR, the threshold has been set to ε = 10 −4
Figure 4: Traveltime tomography (a) and 7-Hz FWI (b-c) Valhall models. (b-c) FWI is performed with the FR (b) and the BLR(ε = 10 −4 ) (c) solver

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