Yantarni Volcano
Updated: Nov 29, 2025 23:20 GMT -
Stratovolcano
United States, Alaska Peninsula, 57.02°N / -157.19°W 
Summit height: 1345 m / 4,413 ft
Current status: normal or dormant (1 out of 5)
[smaller] [larger]
Yantarni volcano eruptions: 800 BC ± 500 years
Latest nearby earthquakes
| Date and Time | Mag / Depth | Distance / Location | |||
|---|---|---|---|---|---|
| Nov 27, 10:25 pm (Universal Time) | 2.0 0.7 km | 29 km (18 mi) to the E | 62 km SE of Ugashik, Alaska | Info | |
Background
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.---
Smithsonian / GVP volcano information
Significant volcanic eruptions: Yantarni volcano
No historic eruptions are known from Yantarni volcano, but at least one eruption around 800 BC can be inferred from geological evidence.
The table below lists all known eruptions (date in bold face) of Yantarni volcano in historic times and during the past 10,000 years. Updates on the most recent volcanic activity of Yantarni can be found on the news page of Yantarni volcano.
| Date | Note | VEI | Deaths | Damage | |
|---|---|---|---|---|---|
| 5 | |||||
Remark:
Our list of volcanic eruptions closely follows the database of eruptions of the Smithsonian's Global Volcanism Project (GVP), the internationally most recognized data source for volcanic eruptions, but also includes significant eruptive episodes or related volcano events. "Volcanic eruptions" are usually to be understood as sequences of individual eruptive episodes that can follow each other, or even overlap (if several vents are involved), and can last many years, decades or even longer. For example, the current activity of Stromboli volcano is understood as a single eruption that has been ongoing since 1934.
Sources: NOAA National Centers for Environmental Information (NCEI), Global Significant Volcanic Eruptions Database. doi:10.7289/V5TD9V7K | Global Volcanism Project / Smithsonian Institution
Yantarni Volcano FAQ
+When was the last eruption of Yantarni volcano?
The last confirmed eruption of Yantarni occurred around 800 BC.
+When was the largest eruption of Yantarni volcano?
The largest eruption known from the younger geological history of Yantarni volcano occurred around 800 BC. It only has a VEI (Volcanic Explosivity Index) of , likely because it was a mainly effusive eruption generating lava flows but very little ash.
Latest satellite images
Yantarni Volcano Maps
Below is a selection of maps showing the location and surroundings of the volcano at various resolutions based on aerial-imagery / terrain maps. Feel free to use them for non-commercial purposes on your blog or website as long as you credit them with a link back to this page (click to copy it).
Satellite/aerial-type map of Yantarni volcano (world scale)
Terrain-type map of Yantarni volcano (world scale)
Satellite/aerial-type map of Yantarni volcano (region scale large)
Terrain-type map of Yantarni volcano (region scale large)
Satellite/aerial-type map of Yantarni volcano (region scale medium)
Terrain-type map of Yantarni volcano (region scale medium)
Satellite/aerial-type map of Yantarni volcano (region scale small)
Terrain-type map of Yantarni volcano (region scale small)
Satellite/aerial-type map of Yantarni volcano (local scale large)
Terrain-type map of Yantarni volcano (local scale large)
Satellite/aerial-type map of Yantarni volcano (local scale medium)
Terrain-type map of Yantarni volcano (local scale medium)
Satellite/aerial-type map of Yantarni volcano (local scale small)
Terrain-type map of Yantarni volcano (local scale small)
Satellite/aerial-type map of Yantarni volcano (scale of 10s of km)
Terrain-type map of Yantarni volcano (scale of 10s of km)
Satellite/aerial-type map of Yantarni volcano (scale of 20-40 km)
Terrain-type map of Yantarni volcano (scale of 20-40 km)
Satellite/aerial-type map of Yantarni volcano (scale of approx. 10-20 km)
Terrain-type map of Yantarni volcano (scale of approx. 10-20 km)
Satellite/aerial-type map of Yantarni volcano (scale of 5-10 km)
Satellite/aerial-type map of Yantarni volcano (scale of few kilometers)
