Alvin (IMAGE) Penn State Caption This is the submersible Alvin, which was used to collect the sediment (from methane seeps in the Eel River Basin, Calif.) used in this study. Credit Emily Beal Usage Restrictions Non-commercial use 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.