Typhoon Roke during a Period of Rapid Intensification (image) NASA/Goddard Space Flight Center Share Print E-Mail Caption This image zooms into the inner core of Typhoon Roke during a period of rapid intensification, seen by the TRMM satellite at 1351 UTC (9:51 a.m. EDT) on Sept. 19, 2011. The background is the cloud-top temperatures (seen by TRMM infrared instrument). Dark gray indicates regions where This image shows shallow clouds (dark gray), clouds above freezing level (blue) and clouds that approach the tropopause (light-gray) indicating vigorous convection. Green tinting indicates precipitation reaching an altitude of 8.5 km and yellow tinting indicates an altitude of 11 km. Credit Credit: NASA/TRMM/Owen Kelley Usage Restrictions None Share Print E-Mail 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.