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Mount Kanaga

Kanaga

Stratovolcano · United States · 1307m

Kanaga is situated within the Kanaton caldera at the northern tip of Kanaga Island. The caldera rim forms a 760-m-high arcuate ridge, which can be seen S and E (left) of Kanaga. The two flows that reach the coast on either side of the sea cliffs in the lower center were produced during an eruptive period from mid-1993 through 1995.
Kanaga is situated within the Kanaton caldera at the northern tip of Kanaga Island. The caldera rim forms a 760-m-high arcuate ridge, which can be seen S and E (left) of Kanaga. The two flows that reach the coast on either side of the sea cliffs in the lower center were produced during an eruptive period from mid-1993 through 1995. · Photo: Photo by Chris Nye, 2000 (Alaska Division of Geological & Geophysical Surveys, Alaska Volcano Observatory). · Wikimedia Commons
Type
Stratovolcano
Country
United States
Region
North America Volcanic Regions / Aleutian Ridge Volcanic Arc
Elevation
1307m
Coordinates
51.923, -177.168
Last eruption
2023
Tectonic setting
Subduction zone / Intermediate crust (15-25 km)
Landform
Composite
Major rock type
Andesite / Basaltic Andesite
Geological summary

Symmetrical Kanaga stratovolcano is situated within the Kanaton caldera at the northern tip of Kanaga Island. The caldera rim forms a 760-m-high arcuate ridge south and east of Kanaga; a lake occupies part of the SE caldera floor. The volume of subaerial dacitic tuff is smaller than would typically be associated with caldera collapse, and deposits of a massive submarine debris avalanche associated with edifice collapse extend nearly 30 km to the NNW. Several fresh lava flows from historical or late prehistorical time descend the flanks of Kanaga, in some cases to the sea. Historical eruptions, most of which are poorly documented, have been recorded since 1763. Kanaga is also noted petrologically for ultramafic inclusions within an outcrop of alkaline basalt SW of the volcano. Fumarolic activity occurs in a circular, 200-m-wide, 60-m-deep summit crater and produces vapor plumes sometimes seen on clear days from Adak, 50 km to the east.

From Wikipedia

Kanaga Volcano, or Mount Kanaga, is a stratovolcano at the northern tip of Kanaga Island in the Aleutian Islands, Alaska. It is situated within a caldera, which forms the arcuate Kanaton Ridge south and east of Kanaga. A crater lake occupies part of the SE caldera floor. The summit of Kanaga has a crater with fumarolic activity.

Wikipedia · CC BY-SA · Read full article →

Eruption history

Summary (VEI over time)
Click a bar to see individual eruptions
7300 BCE~6989 BCE · 1 eruptions · max VEI ?4814 BCE~4503 BCE · 1 eruptions · max VEI ?2328 BCE~2017 BCE · 2 eruptions · max VEI ?2017 BCE~1706 BCE · 1 eruptions · max VEI ?1706 BCE~1395 BCE · 1 eruptions · max VEI ?158~469 · 1 eruptions · max VEI ?780~1091 · 1 eruptions · max VEI ?1091~1401 · 2 eruptions · max VEI ?1712~2023 · 12 eruptions · max VEI 27300 BCE5125 BCE2638 BCE463 BCE1712

Detailed timeline

  1. 2023VEI 1Observed
    2023-12-18 – 2023-12-18
  2. 2012VEI 2Observed
    2012-02-18 – 2012-02-18
    E-W fissure at summit crater
  3. 1996VEI 1Geological estimate
    1996-06-11 – Ongoing
  4. 1995VEI 2Observed
    1995-06-19 – 1995-06-23
  5. 1994VEI 2Observed
    1994-01-05 – 1994-11-26
  6. 1942VEI 1Observed
    1942 – Ongoing
  7. 1906VEI ?Observed
    1906-05 – Ongoing
    Summit, upper SW flank
  8. 1904VEI 0Observed
    1904 – Ongoing
    Upper south flank ?
  9. 1829VEI ?Geological estimate
    1829 – Ongoing
  10. 1827VEI ?Geological estimate
    1827 – Ongoing
  11. 1783VEI ?Observed
    1783 – 1787
  12. 1763VEI ?Geological estimate
    1763 – Ongoing
  13. 1400 (±50 yrs)VEI ?Geological estimate
    1400 – Ongoing
  14. 1150 (±100 yrs)VEI ?Geological estimate
    1150 – Ongoing
  15. 850 (±200 yrs)VEI ?Geological estimate
    850 – Ongoing
  16. 200 (±150 yrs)VEI ?Geological estimate
    200 – Ongoing
  17. 1550 BCE (±100 yrs)VEI ?Geological estimate
    BCE 1550 – Ongoing
  18. 1900 BCE (±300 yrs)VEI ?Geological estimate
    BCE 1900 – Ongoing
  19. 2150 BCE (±200 yrs)VEI ?Geological estimate
    BCE 2150 – Ongoing
  20. 2300 BCE (±150 yrs)VEI ?Geological estimate
    BCE 2300 – Ongoing
  21. 4700 BCE (±150 yrs)VEI ?Geological estimate
    BCE 4700 – Ongoing
  22. 7300 BCE (±500 yrs)VEI ?Geological estimate
    BCE 7300 – Ongoing

External links

⚠ For reference only. Not for emergency response.