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SPECFEM3D

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Journal Article
Published: 12 January 2022
Seismological Research Letters (2022) 93 (2A): 986–996.
... seismic wave propagation in realistic Earth models and performing full‐wave inversion based on the adjoint method (e.g., Tromp et al. , 2005 ; Fichtner et al. , 2006 ; Liu and Tromp, 2006 ). The SPECFEM3D code packages employ the highly accurate spectral element method (SEM) to solve the seismic wave...
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Comparisons of synthetic velocity waveforms computed using <span class="search-highlight">SPECFEM3D</span> (solid...
Published: 07 September 2021
Figure 10. Comparisons of synthetic velocity waveforms computed using SPECFEM3D (solid traces) and the proposed curvilinear method (dashed traces) with six grid points per minimum S wavelength at receivers shown by the triangles on the map at the center. The shading of the map depicts
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The comparisons of the stress computed with ABAQUS and extended <span class="search-highlight">SPECFEM3D</span>. ...
Published: 12 April 2016
Figure 4. The comparisons of the stress computed with ABAQUS and extended SPECFEM3D. (a) gives the Mises stress comparisons of point 1 (left), point 2 (middle), and point 3 (right) computed with von Mises criterion; (b) gives the value comparisons of point 1 (left), point 2 (middle
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The comparisons of the stress computed with ABAQUS and extended <span class="search-highlight">SPECFEM3D</span>. ...
Published: 12 April 2016
Figure 4. The comparisons of the stress computed with ABAQUS and extended SPECFEM3D. (a) gives the Mises stress comparisons of point 1 (left), point 2 (middle), and point 3 (right) computed with von Mises criterion; (b) gives the value comparisons of point 1 (left), point 2 (middle
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Flowchart of the hybrid kinematic rupture model generator implemented in SP...
Published: 17 January 2024
Figure 3. Flowchart of the hybrid kinematic rupture model generator implemented in SPECFEM3D (the blue boxes indicate the main steps). STF, source time function. The color version of this figure is available only in the electronic edition.
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Normalized synthetic single-shot displacement records at the receiver (a) l...
Published: 21 June 2023
Figure 11. Normalized synthetic single-shot displacement records at the receiver (a) line 1 and (b) line 2 shown in Figure  10 . We compute the results with the VPM3D method with a PPW of 15 in the fourth-order staggered-grid FD scheme (the top row), the SPECFEM3D package (the middle row
Journal Article
Journal: Geophysics
Published: 16 August 2021
Geophysics (2021) 86 (5): T321–T335.
... with the output of SPECFEM3D Cartesian ( Peter et al., 2011 ), an established elastic local-scale modeling solver based on a 3D SEM. Finally, to perform the local-scale simulations shown in this paper, a combination of absorbing boundaries is implemented in AxiSEM3D, including automated tuning...
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Journal Article
Published: 17 January 2024
Bulletin of the Seismological Society of America (2024)
...Figure 3. Flowchart of the hybrid kinematic rupture model generator implemented in SPECFEM3D (the blue boxes indicate the main steps). STF, source time function. The color version of this figure is available only in the electronic edition. ...
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Computing time as a function of the degree     N     for the 3D homogeneous...
Published: 19 December 2019
Figure 14. Computing time as a function of the degree N for the 3D homogeneous case, for the short-distance bin ( 20    λ min ), and for the sem3d and specfem3d programs. The symbols with an extra black circle correspond to measurements done with d t = d t CFL .
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The strong scaling experiment measures how the computational time varies wi...
Published: 24 August 2021
Figure 4. The strong scaling experiment measures how the computational time varies with the number of processors for a fixed model size (black line), demonstrating a good strong‐scaling performance of SPECFEM3D. We also show the ideal scaling curve in red for comparison. The color version
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Normalized time-domain seismograms (for (a–c)      u  x     , (d–f)      u ...
Published: 21 June 2023
Figure 8. Normalized time-domain seismograms (for (a–c) u x , (d–f) u y , and (g–i) u z ) computed by the SPECFEM3D package and VPM3D method in the second-order staggered-grid FD scheme with a PPW of 15. These results are received at the receiver (a, d, and g) R1, (b
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Normalized time-domain seismograms (for (a–c)      u  x     , (d–f)      u ...
Published: 21 June 2023
Figure 9. Normalized time-domain seismograms (for (a–c) u x , (d–f) u y , and (g–i) u z ) computed by the SPECFEM3D package and VPM3D method in the second-order staggered-grid FD scheme with a PPW of 15. These results are received at the receiver (a, d, and g) R1, (b
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Comparison of synthetic traces of the benchmark model produced by the 3D AC...
Published: 16 August 2021
Figure 9. Comparison of synthetic traces of the benchmark model produced by the 3D ACA-SEM, AxiSEM3D, and the full 3D SEM, SPECFEM3D Cartesian. The ACA traces were calculated using 10-peak optimization. A 10 Hz Gaussian source wavelet was used. (a) The full range of vertical displacement and (b
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Examples of synthetic displacement waveforms, low‐pass filtered at 12 s, ca...
Published: 30 June 2015
Figure 8. Examples of synthetic displacement waveforms, low‐pass filtered at 12 s, calculated in a 1D layered model (solid line) using a wave propagation code by O’Toole and Woodhouse (2011) and a 3D Earth model using SPECFEM3D (dashed line). The color version of this figure is available only
Journal Article
Published: 12 April 2016
Bulletin of the Seismological Society of America (2016) 106 (3): 1074–1087.
...Figure 4. The comparisons of the stress computed with ABAQUS and extended SPECFEM3D. (a) gives the Mises stress comparisons of point 1 (left), point 2 (middle), and point 3 (right) computed with von Mises criterion; (b) gives the value comparisons of point 1 (left), point 2 (middle...
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Snapshots from a 3D seismic wavefield simulation of the 1964 earthquake con...
Published: 01 March 2014
Figure 1. Snapshots from a 3D seismic wavefield simulation of the 1964 earthquake contributed by C. Tape. (a) is three minutes before (b). The simulation was computed with SPECFEM3D using the source model of Ichinose et al. (2007) modeled to fit seismic, tsunami and uplift data. Full
Journal Article
Published: 31 August 2021
Bulletin of the Seismological Society of America (2021) 111 (5): 2463–2485.
... events and the spectral element dynamic solver SPECFEM3D to resolve their rupture process. To simulate realistic seismicity, with a wide range of magnitudes and irregular recurrence, several realizations of 2D‐correlated heterogeneous random distributions of characteristic weakening distance ( Dc ) in RS...
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The comparisons of the displacements computed with ABAQUS and extended SPEC...
Published: 12 April 2016
Figure 5. The comparisons of the displacements computed with ABAQUS and extended SPECFEM3D. (a) X‐component (left), Y‐component (middle), and Z‐component (right) displacements of point 2 with von Mises criterion; (b) X‐component (left), Y‐component (middle), and Z‐component (right) displacements
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Comparison of synthetics (vertical displacement) produced by ACA-SEM, AxiSE...
Published: 16 August 2021
Figure 13. Comparison of synthetics (vertical displacement) produced by ACA-SEM, AxiSEM3D, and the full 3D SEM, SPECFEM3D, for the SEG salt model. The ACA simulation was optimized for 16 peaks. The receiver positions are shown in Figure  11 . A 10 Hz Gaussian source wavelet was used. (a) Common
Journal Article
Journal: Geophysics
Published: 21 June 2023
Geophysics (2023) 88 (4): T211–T226.
...Figure 11. Normalized synthetic single-shot displacement records at the receiver (a) line 1 and (b) line 2 shown in Figure  10 . We compute the results with the VPM3D method with a PPW of 15 in the fourth-order staggered-grid FD scheme (the top row), the SPECFEM3D package (the middle row...
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