What's under Mt. Hood? (1 of 2) (video) University of California - Davis Loading video... Caption UC Davis volcanologist Kari Cooper talks about new studies of the magma reservoir under Mt. Hood, which could lead to a better understanding of volcanic activity and when volcanoes are most likely to erupt. Credit Video by Andy Fell. Still images by Erik Klemetti, Denison University and the U.S. Geological Survey collection. Usage Restrictions None 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.