CD Contents:

CD Contents:

This CD contains quick time movies of SH-wave propagation using the 3-D axi-symmetric finite difference code. Several movies with prefix ‘ddp’ are made specifically for our study on the D" region beneath the Cocos Plate (Thorne et al., 2004). A description of each of the movies is given below. This CD is the preliminary version of a more comprehensive CD to be completed early 2005. Planned additions include, SH-wave propagation in a homogeneous Earth, full size animations through tomography model TXBW, and animations displaying the formation of a double Scd arrival in the D" model of Thomas et al., 2004. To receive a copy of our future CD or to give suggestions for additional movies or other ideas, please contact Michael Thorne (mthorne@asu.edu).

For best performance please copy movies to your hard drive before playing. All animations are Quicktime format (quicktime player can be downloaded from: http://www.apple.com/quicktime/download/). All animations are 1200 x 900 pixels. For highest resolution playback set your screen resolution to at least 1280 x 1024 pixels.

Movies:

sh_15sec_500km_zoom.mov – Model: PREM. Source depth: 500 km. Shown is the transverse component of velocity at a dominant period of 15 seconds. The region shown is between ±20˚ around the source. Calculation done on 8-nodes of the ASU geophysics linux cluster. [M. Thorne, G. Jahnke, H. Igel, 2004]

sh_15sec_50km_extended.mov – Model: PREM. Source depth: 50 km. Shown is the transverse component of velocity at a dominant period of 15 seconds. The region shown is between ±20˚ around the source. Calculation done on 8-nodes of the ASU geophysics linux cluster. [M. Thorne, G. Jahnke, H. Igel, 2004]

sh_ss_disc_full.mov - Source depth: 50 km. The background model is PREM. The 400- and 670- km discontinuities in PREM are warped in a manner expected if a whole mantle plume were passing through the transition zone. Shown is the transverse component of velocity at a dominant period of 15 seconds. Calculation done on 8-nodes of the ASU geophysics linux cluster. [M. Thorne, N. Schmerr, E. Garnero, G. Jahnke, H. Igel, 2004]

ddp_cocos_prem_12s.mov – Model: PREM. Source depth: 500 km. Shown is the transverse component of velocity at a dominant period of 12 seconds. Calculation done on 8-nodes of the ASU geophysics linux cluster. [M. Thorne, T. Lay, E. Garnero, G. Jahnke, H. Igel, 2004]

ddp_cocos_prem_12s_zoom.mov – Model: PREM. Source depth: 500 km. Shown is the transverse component of velocity at a dominant period of 12 sec. This version is zoomed in on the D" region. The region shown lies between 25º - 55º in epicentral distance and between 3480 km – 4500 km in radius. Calculation done on 8-nodes of the ASU geophysics linux cluster. [M. Thorne, T. Lay, E. Garnero, G. Jahnke, H. Igel, 2004]

ddp_cocos_grand_6s_pure_wavefield_zoom.mov – Model is a cross-section for path 1 of our study through the tomography model TXBW of Grand 2002. Source depth: 500 km. Shown is the transverse component of velocity at a dominant period of 6 sec. This version is zoomed in on the D" region. The region shown lies between 25º - 55º in epicentral distance and between 3480 km – 4500 km in radius. Calculation done on 16-nodes of the SR8000 at the Leibniz Rechenzentrum in München, Germany (http://www.lrz-muenchen.de/). [M. Thorne, T. Lay, E. Garnero, G. Jahnke, H. Igel, 2004]

ddp_cocos_grand_6s_w_velocity.mov – Model is a cross-section for path 1 of our study through the tomography model TXBW of Grand 2002. Source depth: 500 km. Shown is the transverse component of velocity at a dominant period of 6 sec. This version is zoomed in on the D" region. The region shown lies between 25º - 55º in epicentral distance and between 3480 km – 4500 km in radius. Overlain in transparent color is the background velocity from model TXBW. Calculation done on 16-nodes of the SR8000 at the Leibniz Rechenzentrum in München, Germany. [M. Thorne, T. Lay, E. Garnero, G. Jahnke, H. Igel, 2004]

shinjuku.mov – Model: PREM. This movie (and color-scheme) was made on special request by Ed Garnero for ASU’s infamous last-lecture series. Shown is the transverse component of velocity at a dominant period of 15 sec. [M. Thorne, E. Garnero, G. Jahnke, H. Igel, 2004]

References:

Grand, S.P., Mantle shear-wave tomography and the fate of subducted slabs, Philosophical Transactions of the Royal Society of London Series a-Mathematical Physical and Engineering Sciences, 360 (1800), 2475-2491, 2002.

Thorne, M., Lay, T., Garnero, E., Jahnke, G., Igel, H. (2004), 3-D seismic imaging of the D" region beneath the Cocos Plate, Eos Trans. AGU, 85 (47), Fall Meet. Suppl., Abstract U41A-0717

Author Contact Information:

Michael S. Thorne

mthorne@asu.edu

http://ulvz.asu.edu

Department of Geological Sciences

Arizona State University

Tempe, AZ

Nicholas Schmerr

nschmer@asu.du

Department of Geological Sciences

Arizona State University

Tempe, AZ