U.S. Geological Survey Photographic Library
ID. Mount St. Helens - 38Click on photo for higher resolution. Aerial view of crater of Mount St. Helens on April 17, 1980 showing the lava dome. The central plume is a bluish color suggesting the presence of particulate material, in contrast to the pure white steam on the flanks. Photo by R.E. Wallace. Skamania County, Washington. April 17, 1981. Published on p. 143 in U.S. Geological Survey. Earthquake information bulletin, v. 13,no.4. July-August 1981. Image file: /htmllib/btch137/btch137j/btch137z/msh00038.jpg |