Mount St. Helens Click to zoom in Longview, Washington Cowlitz River Columbia River Silver Lake Mount Adams Swift Creek Reservoir Yale Lake Lake Merwin Columbia River Vancouver, Washington Portland, Oregon Scale This is called zero fill Click to zoom out a Landsat image
22 August 1999, Landsat 7 ETM+ bands 4 3 2
1973 -- 1983 -- 1988 -- 1992 -- Map