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Investigating the polar regions from the inside out


GPS Seismic A Historical Perspective


Seismology is the study of earthquakes and ground motion and the propagation of seismic (elastic waves) through the Earth. Using the speed of waves that emanate from earthquakes, seismologists utilize seismic stations to record data which allow them to map the thickness and mechanical strength of layers in the earth’s interior. For example, seismologists can map regions of slow wave speeds, which are indicative of warm Earth layers below the surface. Such layers are weaker and may rise quickly when the ice sheets shrink. They also pass extra heat upward to the base of the ice sheets, causing the ice to become slippery and more likely to slide rapidly into the ocean.

Live POLENET seismic status: http://xeos.passcal.nmt.edu/

Learn more at IRIS PASSCAL Polar Programs: http://www.passcal.nmt.edu/content/polar-programs