AxiSEM: broadband 3-D seismic wavefields in axisymmetric media
By T. Nissen‐Meyer, M. Driel, S. Stähler, Kasra Hosseini, S. Hempel, Ludwig M. Auer, A. Colombi, Alexandre Fournier. 2014
275 citations recorded by the source corpus.
Abstract. We present a methodology to compute 3-D global seismic wavefields for realistic earthquake sources in visco-elastic anisotropic media, covering applications across the observable seismic frequency band with moderate computational resources. This is accommodated by mandating axisymmetric background models that allow for a multipole expansion such that only a 2-D computational domain is needed, whereas the azimuthal third dimension is computed analytically on the fly. This dimensional collapse opens doors for storing space–time wavefields on disk that can be used to compute Frechet sensitivity kernels for waveform tomography. We use the corresponding publicly available AxiSEM ( www.axisem.info ) open-source spectral-element code, demonstrate its excellent scalability on supercomputers, a diverse range of applications ranging from normal modes to small-scale lowermost mantle structures, tomographic models, and comparison with observed data, and discuss further avenues to pursue with this methodology.
Subfields: Geophysics
View Paper: https://www.semanticscholar.org/paper/1e0982bdf1cb12c5a60d8c42aaf5259d59237e85
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In Geophysics
Citations in the corpus
- Finite basis physics-informed neural networks (FBPINNs): a scalable domain decomposition approach for solving differential equations (2021, unknown): “Today these methods are capable of solving highly complex, large-scale problems, and are often implemented using sophisticated, adaptive and parallel algorithms utilising thousands of CPU and GPU cores [Jasak, 2009, Nissen-Meyer et al., 2014].”
- Modular and flexible spectral-element waveform modelling in two and three dimensions (2018, background): “(24) It is common to approximate this time-dependence by a discrete Laplace transform (or discrete relaxation spectrum) that can be equivalently represented as generalized Zener or Maxwell bodies (Emmerich & Korn 1987; Robertsson et al. 1994; Moczo & Kristek 2005; van Driel & Nissen-Meyer 2014).”