Plate Tectonics - Earth Move

Can you feel the ground beneath you moving right now? The ground is moving! It moves a few centimeters per year. Precise EarthScope Global Positioning System (GPS) instruments throughout the United States measure this movement.

Each arrow represents the speed and direction that a single GPS measuring unit
has moved. Longer arrows indicate higher speeds.

Plate Tectonics
GPS Instrument
A scientific GPS instrument is anchored
to the ground.