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The Global Volcanism Program has no activity reports for Yantarni.
The Global Volcanism Program has no Weekly Reports available for Yantarni.
The Global Volcanism Program has no Bulletin Reports available for Yantarni.
Yantarni is a small andesitic stratovolcano located between Aniakchak caldera and Chiginadak volcanoes that was not discovered until 1979. A large breached crater on the NE side, which was formed by collapse of the summit about 2000-3500 years ago, contains a lava dome that marks the volcano's 1345 m high point. This eruption, which resembled that of Mount St. Helens in 1980, began with a debris avalanche produced by the edifice collapse that was accompanied by a possible lateral blast and followed by the emplacement of 1 cu km of pyroclastic flows related to growth of the summit lava dome. No historical eruptions have been documented from Yantarni.
Summary of Holocene eruption dates and Volcanic Explosivity Indices (VEI).
|Start Date||Stop Date||Eruption Certainty||VEI||Evidence||Activity Area or Unit|
|0800 BCE ± 500 years||Unknown||Confirmed||5||Tephrochronology|
The Global Volcanism Program has no synonyms or subfeatures listed for Yantarni.
|Yantarni volcano, a small, 1345-m-high andesitic stratovoclano with no known historical activity, is located on the Alaska Peninsula. This view from the east shows the central lava dome forming the summit. The low knobs on both sides of the dome at the height of the long left-hand ridge are remnants of a large crater breached to the NE, which formed during collapse of the volcano about 2000-3500 years ago.
Photo by Tom Miller, 1985 (U.S. Geological Survey, Alaska Volcano Observatory).
The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title.
Motyka R J, Liss S A, Nye C J, Moorman M A, 1993. Geothermal resources of the Aleutian arc. Alaska Div Geol Geophys Surv, Prof Rpt, no 114, 17 p and 4 map sheets.
Riehle J R, Yount M E, Miller T P, 1987. Petrography, chemistry, and geologic history of Yantarni volcano, Aleutian volcanic arc, Alaska. U S Geol Surv Bull, 1761: 1-27.
Wood C A, Kienle J (eds), 1990. Volcanoes of North America. Cambridge, England: Cambridge Univ Press, 354 p.