GPS Data Used to Model Effects of Tidal Loads on Earth's Surface
Posted by Skywise on April 21, 2011 at 21:37:34:

Interesting article on the Science Daily website about GPS being used to measure the diurnal movement of the Earth's crust and thus inferring the the density of the asthenosphere down to 400km.

GPS Data Used to Model Effects of Tidal Loads on Earth's Surface
http://www.sciencedaily.com/releases/2011/04/110415104542.htm

Brian