EarthScope instruments are measuring the motion of the
Basin and Range Province. The mountains are rising about 0.3 mm per year, the
tectonic plate is extending 5 mm per year.
Each arrow represents a speed (the length of the arrow) and a direction (which way the arrow is pointing) that a single
scientific GPS station anchored to the ground has moved relative to regions east of the Rocky Mountains. The base of the arrow is the location of the GPS station, and the head of the arrow is the direction it is moving.