A low-pressure system north of the United Kingdom was blowing dust off Iceland and sending it southward over the Atlantic Ocean on Oct. 5, 2004. Light brown streamers of dust were blowing southward off the southern coast of Iceland on October 5, 2004. Strong winds pushed by a large low-pressure system to the southeast (not shown in this image) were sweeping the dust off the land and carrying it for more than a hundred kilometers over the North Atlantic. True-color image.