 Volcano before the 1964 eruption. Photo by G.Gorshkov. |
 Volcano after the 1964 eruption. Cloud of steam raises above the horseshoe-shaped crater. Photo by G.Gorshkov. |
 Front of the 1964 debris avalanche deposit. |
 Aerial photo of surface of 1964 debris avalanche. Front of the avalanche deposit is in the lower part of the photo. Longitudinal furrows "striate" the deposit surface. |
 Hummocky surface of the 1964 debris avalanche deposit. View from helicopter. |
 The 1964 debris avalanche hummocks. |
 Section of the 1964 deposits. Debris avalanche deposit (base), covered by fine-grained yellow ash fall deposit of phreatic explosion (middle) and coarse pumice of plinian eruption (uppermost layer). |  Surface of coarse tephra (pumice) deposited duting plinian stage of the 1964 eruption. |