Infrared Image of Tropical Storm Sonca (IMAGE) NASA/Goddard Space Flight Center Caption This infrared image of Tropical Storm Sonca was captured on Sept. 14 at 10:41 p.m. EDT. The purple area around the center of circulation indicates the coldest, highest cloud heights, where the heaviest rain was occurring. Satellite data also shows Sonca has taken on the signature "comma" shape of a tropical storm. Credit NASA JPL, Ed Olsen 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.