Global Volcanism Program | Image GVP-05331
An ash plume erupts from eastern crater of the newly formed Ukinrek Maars on 6 April 1977. West Maar formed during the initial days of the eruption that began on 30 March. Three days later explosions began at East Maar, 600 m away. At the peak of the eruption ash plumes reached up to 6 km above the vent. On the 4th day of the eruption a lava dome appeared within East Maar.
Photo by R. Russell, 1977 (Alaska Department of Fish and Game).
This image is made available as a Public Domain Work, but proper attribution is appreciated.