DSM Seismograms for l=1
Upper Mantle Density

Phil Cummins,
ANU Research School of Earth Sciences.

This visualization shows the propagation of seismic waves through the Earth's interior. The earthquake which generates the waves occurs at 600km depth, which is typical of the deep earthquakes in subduction zones such as Fiji or the western coast of South America. Because the center of the Earth is fluid, the shear waves pictured here do not penetrate the core but bounce off, just as they do at the Earth's surface. As time progresses the wave field becomes a complicated pattern of interference between waves reflected off the surface and those reflected off the core.

Click image to see an MPEG movie of the simulation (603k)

Phil Cummins