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Yantarni Volcano

Yantarni

Stratovolcano · United States · 1345m

Yantarni is located on the Alaska Peninsula, with this view from the east showing the lava dome at the summit. On either side of the dome are remnants of a large crater that opens to the NE, which formed during flank collapse about 2,000-3,500 years ago.
Yantarni is located on the Alaska Peninsula, with this view from the east showing the lava dome at the summit. On either side of the dome are remnants of a large crater that opens to the NE, which formed during flank collapse about 2,000-3,500 years ago. · Photo: Photo by Tom Miller, 1985 (Alaska Volcano Observatory, U.S. Geological Survey). · Wikimedia Commons
Type
Stratovolcano
Country
United States
Region
North America / Alaska Peninsula Volcanic Arc
Elevation
1345m
Coordinates
57.019, -157.185
Last eruption
-800
Tectonic setting
Subduction zone / Continental crust (> 25 km)
Landform
Composite
Major rock type
Andesite / Basaltic Andesite
Geological summary

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, formed by collapse of the summit about 2000-3500 years ago, contains a lava dome that marks the summit. 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 km3 of pyroclastic flows related to growth of the summit lava dome.

Eruption history

Summary (VEI over time)
Click a bar to see individual eruptions
800 BCE~800 BCE · 1 eruptions · max VEI 5800 BCE800 BCE799 BCE799 BCE799 BCE

Detailed timeline

  1. 800 BCE (±500 yrs)VEI 5Geological estimate
    BCE 800 – Ongoing

External links

⚠ For reference only. Not for emergency response.