Imagery from the Landsat-7 satellite shows two glimpses of the same area: one taken on May 5, 2011 and the other on June 7, 2011. In the image from May 5, green areas indicate healthy vegetation and grasslands, light pink areas are naturally occurring rock or bare land. In the image from June 7, the red color indicates burned areas. In some cases, "hot" pink colors can also be seen along with smoke - these are active fire areas. Data from Landsat, a NASA-USGS partnership that was formerly managed by NOAA, is frequently used by NOAA for assessing land cover changes, especially in coastal and wetland ares.