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Asuncion Island

Asuncion

Stratovolcano · United States · 857m

An aerial view from the SW shows the upper slopes of Asuncion in the northern Mariana Islands. It forms a circular 3-km-wide island that has had no permanent residents since the late 17th century. An explosive eruption in 1906 produced lava flows that descended about halfway down the W and S flanks.
An aerial view from the SW shows the upper slopes of Asuncion in the northern Mariana Islands. It forms a circular 3-km-wide island that has had no permanent residents since the late 17th century. An explosive eruption in 1906 produced lava flows that descended about halfway down the W and S flanks. · Photo: Photo by Richard Moore, 1992 (U.S. Geological Survey). · Wikimedia Commons
Type
Stratovolcano
Country
United States
Region
Northwestern Pacific Volcanic Regions / Mariana Volcanic Arc
Elevation
857m
Coordinates
19.671, 145.406
Last eruption
1906
Tectonic setting
Subduction zone / Crustal thickness unknown
Landform
Composite
Major rock type
Andesite / Basaltic Andesite
Geological summary

A single large asymmetrical stratovolcano forms 3-km-wide Asuncion Island. The steeper NE flank terminates in high sea cliffs, while the gentler SW flanks have low-angle slopes bounded by sea cliffs only a few meters high. The southern flank is cut by a large landslide scar. The S and W flanks are covered by ash deposits. An explosive eruption in 1906 produced lava flows that descended about halfway down the W and SE flanks, but several other eruption reports are of uncertain validity.

From Wikipedia

Asuncion is an island in the Mariana Islands chain in the Pacific Ocean. The island is uninhabited. Asuncion is situated 101 kilometers northwest of Agrihan and 37 km southeast of the Maug Islands. The island is part of the Commonwealth of the Northern Mariana Islands.

Wikipedia · CC BY-SA · Read full article →

Eruption history

Summary (VEI over time)
Click a bar to see individual eruptions
1690~1713 · 1 eruptions · max VEI ?1760~1784 · 1 eruptions · max VEI 21901~1924 · 2 eruptions · max VEI 216901737180718541901

Detailed timeline

  1. 1924VEI 2Geological estimate
    1924 – Ongoing
  2. 1906VEI 2Observed
    1906 – Ongoing
    Upper SE and W flanks
  3. 1775 (±10 yrs)VEI 2Geological estimate
    1775 – Ongoing
  4. 1690 (±10 yrs)VEI ?Geological estimate
    1690 – Ongoing

External links

⚠ For reference only. Not for emergency response.