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Global Volcanism Program | Image GVP-01645

Steam rises from a pyroclastic flow deposit on the NW flank of Ulawun in February 1970. Rainforest trees were blown down facing away from the volcano by a high-velocity pyroclastic surge at the margins of the 22 January pyroclastic flow, which traveled 5 km from the summit. Pyroclastic flow velocities on the upper part of the volcano were estimated to exceed 100 km/hour. Photo by Robert Citron, 1970 (Smithsonian Institution; courtesy of William Melson)

Steam rises from a pyroclastic flow deposit on the NW flank of Ulawun in February 1970. Rainforest trees were blown down facing away from the volcano by a high-velocity pyroclastic surge at the margins of the 22 January pyroclastic flow, which traveled 5 km from the summit. Pyroclastic flow velocities on the upper part of the volcano were estimated to exceed 100 km/hour.

Photo by Robert Citron, 1970 (Smithsonian Institution; courtesy of William Melson)

Creative Commons Icon This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.

Galleries: Pyroclastic Flows

Keywords: pyroclastic flow | environmental impact | steam | gas | deposit


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