Earth from Space - Image Description

STS028-073-039 Revillagigedo Island, Alaska, U.S.A August 1989
Part of the southern Alaskan panhandle is discernible in this photograph. Snow accentuates the ridge lines and peaks in the higher elevations. A small glacier can be seen in the lower-right corner. The light blue water of the Behm Canal, which separates Revillagigedo Island from the mainland of North America, is created by "rock-flour" sediment that is the result of glacial erosion. The Portland Canal, visible at the bottom of the photograph, forms part of the U.S.-Canada border.

This service is provided by the International Space Station program and the JSC Earth Science & Remote Sensing Unit, ARES Division, Exploration Integration Science Directorate.