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One of the earliest important discoveries was that the outer core of the Earth is molten. Pressure waves pass through the core. If the core was not in a liquefied state, ransverse or shear waves that shake side-to-side would be recorded as they respond to the presence of rigid material.
One of the earliest important discoveries was that the outer core of the Earth is molten. Pressure waves pass through the core. If the core was not in a liquefied state, ransverse or shear waves that shake side-to-side would be recorded as they respond to the presence of rigid material.
The process of mapping subsurface features is a specialty field called [[seismography]] or [[seismic interpretation]]. Seismic waves are generated in controlled experiments using dynamite and other explosives which generated waves withing the earth. These waves are convolved to yield seismic data which have been used (successfully) to map geological features in hydrocarbon-bearing rocks, faults (cracks in deep rock), rock types, and a lot of other features in the earth.
The process of mapping subsurface features is a specialty field called [[seismography]] or [[seismic interpretation]]. Seismic waves are generated in controlled experiments using dynamite and other explosives which generated waves within the earth. These waves are convolved to yield seismic data which have been used (successfully) to map geological features in hydrocarbon-bearing rocks, faults (cracks in deep rock), rock types, and a lot of other features in the earth.
Using seismic tomography with earthquake waves, the interior of the Earth has been completely mapped to a resolution of several hundred kilometers. This process has enabled scientists to identify convection cells, mantle plumes and other large features of the inner Earth.
Using seismic tomography with earthquake waves, the interior of the Earth has been completely mapped to a resolution of several hundred kilometers. This process has enabled scientists to identify convection cells, mantle plumes and other large features of the inner Earth.
[[Category:Geophysics]]
[[Category:Geophysics]]