Nighttime Suomi NPP Image of Irma (IMAGE) NASA/Goddard Space Flight Center Caption At 2:57 a.m. AST/EDT on Sept. 7, Suomi NPP's Day Night Band imagery and the waning gibbous moon highlighted the convection around Irma's eye and tropospheric gravity waves were present around the well-defined eyewall. Credit Credits: NOAA/NASA/UWM-CIMSS, William Straka III 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.