Big Earthquakes Create Global-Scale GPS Errors
▻http://www.livescience.com/34651-gps-errors-from-earthquakes.html
The Global Positioning System is a network of satellites and ground stations that provide location information anywhere on Earth. Except for spots in Australia, western Europe and the eastern tip of Canada, every GPS site on the ground underwent small but important shifts since 2000 because of big earthquakes, according to a study published May 6 in the Journal of Geophysical Research: Solid Earth.