Moat Graphic (IMAGE) University of Washington Caption A conceptual model shows a hurricane undergoing eyewall replacement, with the moat structure based on observations from the Hurricane Rainband and Intensity Change Experiment. Credit Robert Houze/University of Washington Usage Restrictions May be reproduced for bona fide news purposes. 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.