GPM Satellite View of Hurricane Simon (IMAGE) NASA/Goddard Space Flight Center Caption On Oct. 4 at 0940 UTC (5:40 a.m. EDT) GPM observations suggested Hurricane Simon was hiding a very compact eyewall hours before detection of rapid intensification of Hurricane Simon's surface winds. Credit NASA/JAXA, Owen Kelley Usage Restrictions None 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.