NSF EarthScope Plate Boundary Observatory GPS Network (IMAGE) U.S. National Science Foundation Caption The NSF EarthScope Plate Boundary Observatory GPS network is providing millimeter-precision data. Credit NSF EarthScope Program Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.