Volcanic violence varies vista


  • Anonymous


This recent photograph shows Mount St. Helens' crater about a year after the volcano came to life on March 27, 1980, following 123 years of quiet. The lava dome (the darkened, raised area in the photo's center) developed during the volcano's eruptions over the last several months. The dome now measures 150 m in height and is 610 m long. The upper part of the photo shows the steep walls of the 2-km by 3.2-km crater. Currently, the crater occupies the general area of the north face of the mountain, which bulged for months prior to the violent May 18 eruption. (Photo courtesy of the U.S. Geological Survey, Department of the Interior