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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).

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).

Keywords: lava dome | lava flow | landslide scarp | emissions | gas | gas plume | volcanic gases | plume


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