Gravity anomaly grids for the conterminous US

Online link https://mrdata.usgs.gov/gravity/
Description Measurements of the gravitational field vary slightly from place to place due to the composition and structure of Earth's crust. Includes the isostatic and Bouguer anomalies for the conterminous US.
Originators U.S. Geological Survey
Publication U.S. Geological Survey Digital Data Series DDS-9
Metadata Questions and answers