GeodesyReceiverLangjokull-inBkg-Bennett.jpg

This global positioning satellite receiver is part of Iceland's network of 62 such receivers that geoscientists are using to detect movements of the Icelandic crust that are as small as one millimeter per year. Langjokull glacier is in the background. (Photo: Richard A. Bennett/UA Department of Geosciences) This global positioning satellite receiver is part of Iceland's network of 62 such receivers that geoscientists are using to detect movements of the Icelandic crust that are as small as one millimeter per year. Langjokull glacier is in the background.