Saharan dust blowing off the west coast of Africa and over the Canary Islands (a Spanish archipelago) on 11 November 2006. The horizontal line is the border between Morocco (to the north) and Western Sahara. The plumes of dust are more distinct off the coast of the former than the latter. The fine particles blow to the northwest, and although the islands of Tenerife and Gran Canaria appear unaffected, the neighboring islands of Fuerteventura and Lanzarote are receiving a strong dusting. Click on photo for higher resolution. Image courtesy of NASA.