Global Volcanism Program | Image GVP-02457
The small hummocks (hills) in this photo formed during a 1956 eruption of Bezymianny, an eruption that resembled the 1980 eruption of Mount St. Helens. The hummocky terrain is reminiscent of the debris avalanche deposit filling the Toutle River at St. Helens, and likewise was produced by a massive volcanic landslide when Bezymianny collapsed on 30 March 1956. The hummocks consist of material from the edifice that traveled out to 18 km E.
Photo by Dan Miller (U.S. Geological Survey).