Ice Core (IMAGE) Desert Research Institute Caption Detailed records of past explosive volcanic eruptions are archived in the Greenland ice sheet and accessed through deep-drilling operations. Credit Dorthe Dahl-Jensen Usage Restrictions This image is under embargo until June 22, 2020 at 3:00 PM U.S. Eastern time. The image may only be used with appropriate caption or credit. 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.