Aqua image of TD4C (IMAGE) NASA/Goddard Space Flight Center Caption On Aug. 21 at 9:40 a.m. EDT NASA's Aqua satellite captured the development of Tropical Depression 4C in infrared light. Red indicates coldest cloud tops and strongest storms. Credit Credits: NASA/NRL 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.