The InSAR Data of Okmok Volcano in Alaska Covering the Deformation Triggered by the Eruption (image) Frontiers Share Print E-Mail Caption Each set of fringe corresponds to a ground movement of ~3 cm. Credit Courtesy of the Institut des Sciences de la Terre (ISTerre). Usage Restrictions Courtesy of the Institut des Sciences de la Terre (ISTerre). Share Print E-Mail 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.