Global Volcanism Program | Image GVP-02449
Growth of the Novy lava dome was accompanied by pyroclastic flows through much of 1990. On 10-11 March a short viscous lava flow was extruded, and a 10-km-high ash plume was accompanied by pyroclastic flows that traveled 4-5 km. Lava extrusion, hot avalanches, and occasional pyroclastic flows took place 1-12 April, 11-15 July, 15-20 August, and 26 November-3 December. This photo, taken from the NE on 21 September 1990, shows a dark lava flow descending the eastern flank of the dome.
Photo by Dan Miller, 1990 (U.S. Geological Survey).