Concerning geology, tomography is the study of the internal structure of the earth with penetrating waves, either artificial or natural
Geophysical tomography is geophysical technique that investigates the subsurface. There are many different kinds of imaging techniques, all which are based on applied physics.
Types of geophysical tomography include
– Electrical resistivity tomography
– Ground-penetrating radar
– Induced polarization
– Seismic tomography and Reflection seismology
“In this animation we simplify things and make an Earth of uniform density (isotropic; constant velocity sphere) with a slow zone that we image as a magma chamber for simplicity. For reference, the Earth figures below show the difference between our simple animation and a body with changes in rock type and temperature that cause the seismic waves to refract and bend when transmitted between different rock compositions.”