Geodesy is the study of Earth’s shape, gravity field and rotation. An excellent method to study the Earth is by use of high-precision Continuous Global Positioning System (CGPS) stations that are firmly mounted on bedrock and can measure the slow, persistent ground motion of Earth’s crustal plates down to a few millimeters over time. In the western United States, there are more than 1,200 CGPS stations, including more than 25 on the Central Coast. A few of these stations are classified as Global Positioning System Meteorology (GPS-Met), such as the ones located in Cambria, Los Osos and Point Sal.