Movie Credits:
This page contains animations of seismic wave propagation. The global animations in this section are animations of SH-wave propagation. These animations were created with the axi-symmetric finite difference code SHaxi. The code is presented in: Jahnke, G., Thorne, M.S., Cochard, A., and Igel, H. Global SH-wave propagation using a parallel axi-symmetric finite difference scheme, in review GJI, 2008.
All computations were performed on the GCC linux cluster at ASU, the Hitachi SR800 at the Leibniz Rechenzentrum, or ICEBERG at the Arctic Region Supercomputing Center.
The SHaxi source code can be downloaded at the SPICE webpage here.
Movie formats:
All animations on this page are available as Quicktime Movies. To play the movies, the Quicktime Player is required. For best playback saving the movies to your harddrive is recommended. To download the movies right click on the image | Save Target As...
In the Quicktime player, selecting 'Movie | Loop' will continuously loop the movies.
Movies are now available in .m4v format for use with Itunes/Ipod.
| 03 |
Homogeneous Velocities; Low velocity Layer |
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LowV_Layer.mov (34.6 Mb) |
Quicktime format |
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LowV_Layer.m4v (1.8 Mb) |
Ipod format |
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LowV_Layer.ogg |
Ogg format(best for Linux) |
- Homogeneous velocity model with a low velocity layer. Model has density of 4.0 g/cm3 and Vs is 3.5 km/sec except in low velocity layer. The low velocity layer is contained between radii 5200 and 5800 km and has a velocity of 2.5 km/sec.
- Source Depth: 0 km
- Dominant Period: 30 sec
- Plot Range: -70° < θ < 70°
- Non-linear scale: 0.5
- Z-grid points: 2,000
- Theta-grid points: 10,000
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| 04 |
Homogeneous Velocities; High velocity Layer |
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HiV_Layer.mov (39.8 Mb) |
Quicktime format |
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HiV_Layer.m4v (1.8 Mb) |
Ipod format |
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HiV_Layer.ogg |
Ogg format(best for Linux) |
- Homogeneous velocity model with a high velocity layer. Model has density of 4.0 g/cm3 and Vs is 3.5 km/sec except in high velocity layer. The high velocity layer is contained between radii 5200 and 5800 km and has a velocity of 4.5 km/sec.
- Source Depth: 0 km
- Dominant Period: 30 sec
- Plot Range: -85° < θ < 85°
- Non-linear scale: 0.5
- Z-grid points: 2,000
- Theta-grid points: 10,000
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| 05 |
Homogeneous Velocities; Low velocity body (50 km radius) |
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Low_Vbody_50km.mov (30.6 Mb) |
Quicktime format |
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Low_Vbody_50km.m4v (842 Kb) |
Ipod format |
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Low_Vbody_50km.ogg |
Ogg format(best for Linux) |
- Vs 3.5 km/sec except in the low velocity body which has Vs reduction of 5% (Velocity = 3.325 km/sec). Radius of low velociy region is 50.0 km, and is centered at a depth of 1371 km, and epicentral distance of 30°. 30 sec Dominant Period corresponds to a wavelength of 105 km in the homogeneous velocity model. Thus, the size of the low velocity body is on the order of 1-dominant wavelength.
- Source Depth: 0 km
- Dominant Period: 30 sec
- Plot Range: -10° < θ < 75°
- Non-linear scale: 0.5
- Z-grid points: 2,000
- Theta-grid points: 10,000
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| 06 |
Homogeneous Velocities; Low velocity body (150 km radius) |
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Low_Vbody_150km.mov (29.5 Mb) |
Quicktime format |
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Low_Vbody_150km.m4v (937 Kb) |
Ipod format |
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Low_Vbody_150km.ogg |
Ogg format(best for Linux) |
- Vs 3.5 km/sec except in the low velocity body which has Vs reduction of 5% (Velocity = 3.325 km/sec). Radius of low velociy region is 50.0 km, and is centered at a depth of 1371 km, and epicentral distance of 30°. 30 sec Dominant Period corresponds to a wavelength of 105 km in the homogeneous velocity model. Thus, the size of the low velocity body is on the order of 3-dominant wavelengths.
- Source Depth: 0 km
- Dominant Period: 30 sec
- Plot Range: -10° < θ < 75°
- Non-linear scale: 0.5
- Z-grid points: 2,000
- Theta-grid points: 10,000
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| 09 |
PREM model with topography on the D" discontinuity |
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Ddoubleprime_interaction.mov (27.0 Mb) |
Quicktime format |
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Ddoubleprime_interaction.m4v (3.7 Mb) |
Ipod format |
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Ddoubleprime_interaction.ogg |
Ogg format(best for Linux) |
- Model Type: Model Type: PREM w/ D"; discontinuity based on Thomas et al. (2004)
- Source Depth: 500 km
- Dominant Period: 10 sec
- Plot Range Inset: -5° < θ < 90°
- Plot Range Zoom (theta): 25° < θ < 55°
- Plot Range Zoom (radius): 3480 < r < 4500 km
- Non-linear scale: 0.3
- Z-grid points: 2,750
- Theta-grid points: 20,000
- Reference: Thorne, M.S., Lay, T., Garnero, E.J., Jahnke, G., Igel, H., Seismic imaging of the laterally varying D" region beneath the Cocos Plate, Geophysical Journal International (170), pp. 635-648, doi: 10.1111/j.1365-246X.2006.03279.x, 2007. (pdf - 9.8 Mb)
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| 10 |
PREM model with lens of post-perovskite in lower mantle |
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pPv_lens_animation.mov (7.0 Mb) |
Quicktime format |
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pPv_lens_animation.m4v (2.2 Mb) |
Ipod format |
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pPv_lens_animation.ogg |
Ogg format(best for Linux) |
- Model Type: Model Type: PREM w/ lens of pPv.
- Source Depth: 600 km
- Dominant Period: 10 sec
- Reference: Lay, T., Hernlund, J., Garnero, E.J., Thorne, M.S., A lens of post-perovskite and CMB heat flux in an iron-rich pile in D" beneath the Central Pacific, Science (314), 1272-1276, 2006. (pdf - 323 kb) (online supplemental material - 1.6 Mb)
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