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Global Volcanism Program | Image GVP-02324

An ash plume rises from the summit crater of Avachinsky on 16 January 1991. An explosive eruption began on 13 January 1991 and produced ash plumes 4-5 km above the crater, resulting in ashfall on Petropavlovsk. During the eruption, lava filled the 260-m-wide summit crater. Small lava flows spilled over the crater rim and advanced 1.5 km down the SSE flank and a short distance down the SW flank. The lava flows melted snow to form small lahars down the S flank. Photo by Oleg Volynets, 1991 (Institute of Volcanology, Petropavlovsk).

An ash plume rises from the summit crater of Avachinsky on 16 January 1991. An explosive eruption began on 13 January 1991 and produced ash plumes 4-5 km above the crater, resulting in ashfall on Petropavlovsk. During the eruption, lava filled the 260-m-wide summit crater. Small lava flows spilled over the crater rim and advanced 1.5 km down the SSE flank and a short distance down the SW flank. The lava flows melted snow to form small lahars down the S flank.

Photo by Oleg Volynets, 1991 (Institute of Volcanology, Petropavlovsk).

Keywords: ash | ash plume | eruption | steam | gas | emissions


Avachinsky