The two fastest Antarctic glaciers, Pine Island (top centre) and Thwaites (bottom right) in West Antarctica, as seen by ESA's Envisat Advanced Synthetic Aperture Radar (ASAR) on 15 August 2011. The Pine Island and Thwaites glaciers are moving several times faster than any other glacier on Antarctica. A large iceberg, identified as B-22A iceberg, detached from Thwaites glacier few years ago, but still remains close as it may be grounded on a submarine shoal. The B-22A iceberg measures 80×45 km, the Envisat ASAR image size is 226×335 km.
More Envisat images can be found at ESA's MIRAVI website http://miravi.eo.esa.int