Aqua Image of Subtropical Depression 4 (IMAGE) NASA/Goddard Space Flight Center Caption On June 23 at 2:10 a.m. EDT (0610 UTC), NASA's Aqua satellite found several fragmented and disorganized thunderstorms circling the center of circulation of Subtropical Depression 4, where cloud top temperatures as cold as or colder than minus 50 degrees Fahrenheit (minus 45.5 Celsius). Credit Credit: 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.