Old Faithful Hydrogeology (IMAGE) University of Utah Caption This is the model of Old Faithful's hydrogeological system suggested by the study's results. Credit Sin-Mei Wu Usage Restrictions Credit Sin-Mei Wu 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.