EarthScope has two observatories active in Alaska.
- The Plate Boundary Observatory run by UNAVCO has deployed scores of high precision GPS receivers capable of measuring millimeter-scale motions of Earth's crust. These instruments along with strainmeters and tiltmeters help us learn about plate tectonics, earthquakes, and volcanoes and could aid in earthquake and tsunami early warning systems.
- The USArray run by the Incorporated Research Institutions for Seismology is a network of seismometers and other instruments designed to help us better understand the structure of the crust and mantle. It also provides unprecedented insights into earthquake physics, volcanic processes, active tectonics, and continental structure and evolution.