Global Volcanism Program | Image GVP-09453
During a 1902 expedition in the Mount Wrangell area the U. S. Geological Survey geologist W. C. Mendenhall observed plumes and ash-covered snow. This photograph showing an ash plume rising above the summit crater was probably taken during the summer of 1902. Ash darkens the snow over a wide area of the southern slopes of the volcano. The small cone on the far-left horizon is Mount Zanetti.
Photo by W.C. Mendenhall, 1902 (U. S. Geological Survey).