Sustina Glacier

This is Alaska's Susitna Glacier, featuring ice formations that flow downhill. This image was taken with the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) aboard NASA's Tera satellite on August 27, 2009. In the image, we see red, green, and infrared wavelengths, which form a false-color image. Here, vegetation is red, and the surface of the glacier is marked with blue ice that is dirt-free and brown, dirty ice.