ITOT Map (IMAGE) University of Washington Caption Internal tides seen in sea surface height satellite data recorded from 1992 to 2012. Figures show (a) northbound and (b) southbound waves. The blue patches are places where the data was inconclusive. Black boxes are example regions used in the analysis. Credit Zhongxiang Zhao/University of Washington Usage Restrictions With 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.