This activity gives students a visual representation of how volcanoes and earthquakes are related to plate boundaries and gets students working with real data. This lab also introduces students to the concept of vectors in the form of GPS data showing plate motion. In this interactive website activity, students use UNAVCO's EarthScope Voyager Jr. website in order to observe location data for volcanoes, and location and depth data for earthquakes. A worksheet is provided outlining the use of the GPS tool and a series of questions that students will use to make Relationships Between Earthquakes, Volcanoes, and Plate Boundaries in the Western U.S.