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Mount Redoubt

Redoubt

Stratovolcano · United States · 3108m

Redoubt is on the west side of Cook Inlet, 170 km SW of Anchorage. It was constructed over a basement of glacially eroded Mesozoic granitic rocks, seen here in the foreground. The volcano has been very active during the Holocene, producing at least 30 tephra layers in the Cook Inlet basin stratigraphy. A plume rises from the summit crater in this view from the NE following its 1989-90 eruption. Iliamna is visible in the distance to the left.
Redoubt is on the west side of Cook Inlet, 170 km SW of Anchorage. It was constructed over a basement of glacially eroded Mesozoic granitic rocks, seen here in the foreground. The volcano has been very active during the Holocene, producing at least 30 tephra layers in the Cook Inlet basin stratigraphy. A plume rises from the summit crater in this view from the NE following its 1989-90 eruption. Iliamna is visible in the distance to the left. · Photo: Photo by Christina Neal (U.S. Geological Survey, Alaska Volcano Observatory). · Wikimedia Commons
Type
Stratovolcano
Country
United States
Region
North America Volcanic Regions / Alaska Peninsula Volcanic Arc
Elevation
3108m
Coordinates
60.485, -152.742
Last eruption
2009
Tectonic setting
Subduction zone / Continental crust (> 25 km)
Landform
Composite
Major rock type
Andesite / Basaltic Andesite
Geological summary

Redoubt is a glacier-covered stratovolcano with a breached summit crater in Lake Clark National Park about 170 km SW of Anchorage. Next to Mount Spurr, Redoubt has been the most active Holocene volcano in the upper Cook Inlet. The volcano was constructed beginning about 890,000 years ago over Mesozoic granitic rocks of the Alaska-Aleutian Range batholith. Collapse of the summit 13,000-10,500 years ago produced a major debris avalanche that reached Cook Inlet. Holocene activity has included the emplacement of a large debris avalanche and clay-rich lahars that dammed Lake Crescent on the south side and reached Cook Inlet about 3,500 years ago. Eruptions during the past few centuries have affected only the Drift River drainage on the north. Historical eruptions have originated from a vent at the north end of the 1.8-km-wide breached summit crater. The 1989-90 eruption had severe economic impact on the Cook Inlet region and affected air traffic far beyond the volcano.

From Wikipedia

Redoubt Volcano, or Mount Redoubt, is an active stratovolcano in the largely volcanic Aleutian Range of the U.S. state of Alaska. Located at the head of the Chigmit Mountains subrange in Lake Clark National Park and Preserve, the mountain is just west of Cook Inlet, in the Kenai Peninsula Borough about 110 miles (180 km) southwest of Anchorage. At 10,197 feet (3,108 m), in just over 5 miles (8.0 km) Mount Redoubt attains 9,150 feet (2,790 m) of prominence over its surrounding terrain. It is the highest summit in the Aleutian Range. In 1976, Redoubt Volcano was designated as a National Natural Landmark by the National Park Service.

Wikipedia · CC BY-SA · Read full article →

Eruption history

Summary (VEI over time)
Click a bar to see individual eruptions
9310 BCE~8933 BCE · 1 eruptions · max VEI ?7801 BCE~7423 BCE · 2 eruptions · max VEI ?7423 BCE~7046 BCE · 3 eruptions · max VEI ?6292 BCE~5914 BCE · 6 eruptions · max VEI ?5914 BCE~5537 BCE · 3 eruptions · max VEI ?5537 BCE~5160 BCE · 1 eruptions · max VEI ?5160 BCE~4782 BCE · 3 eruptions · max VEI ?4782 BCE~4405 BCE · 1 eruptions · max VEI ?4405 BCE~4028 BCE · 1 eruptions · max VEI ?4028 BCE~3650 BCE · 4 eruptions · max VEI ?3650 BCE~3273 BCE · 2 eruptions · max VEI ?3273 BCE~2896 BCE · 4 eruptions · max VEI ?2896 BCE~2519 BCE · 2 eruptions · max VEI ?2519 BCE~2141 BCE · 2 eruptions · max VEI ?2141 BCE~1764 BCE · 3 eruptions · max VEI ?1764 BCE~1387 BCE · 6 eruptions · max VEI ?1387 BCE~1009 BCE · 8 eruptions · max VEI ?1009 BCE~632 BCE · 5 eruptions · max VEI ?632 BCE~255 BCE · 11 eruptions · max VEI ?255 BCE~123 · 7 eruptions · max VEI ?123~500 · 3 eruptions · max VEI ?500~877 · 4 eruptions · max VEI ?877~1254 · 4 eruptions · max VEI ?1254~1632 · 4 eruptions · max VEI ?1632~2009 · 9 eruptions · max VEI 39310 BCE6669 BCE3650 BCE1009 BCE1632

Detailed timeline

  1. 2009VEI 3Observed
    2009-03-15 – 2009-07-01
    South of 1990 dome
  2. 1989VEI 3Observed
    1989-12-14 – 1990-06-20
    North end of summit crater (2470 m)
  3. 1967VEI 3Observed
    1967-12-06 – 1968-04-28
    North end of summit crater (2300 m)
  4. 1966VEI 3Observed
    1966-01-24 – 1966-02-20
    North end of summit crater (2300 m)
  5. 1966VEI 3Observed
    1966-10-07 – 1967-01-15
    North end of summit crater (2300 m)
  6. 1933VEI ?Geological estimate
    1933-05-25 – Ongoing
  7. 1902VEI 3Observed
    1902-01-18 – Ongoing
  8. 1819VEI ?Geological estimate
    1819 – Ongoing
  9. 1650 (±75 yrs)VEI ?Geological estimate
    1650 – Ongoing
  10. 1530 (±75 yrs)VEI ?Geological estimate
    1530 – Ongoing
  11. 1510 (±75 yrs)VEI ?Geological estimate
    1510 – Ongoing
  12. 1400 (±75 yrs)VEI ?Geological estimate
    1400 – Ongoing
  13. 1360 (±75 yrs)VEI ?Geological estimate
    1360 – Ongoing
  14. 1200 (±75 yrs)VEI ?Geological estimate
    1200 – Ongoing
  15. 1160 (±75 yrs)VEI ?Geological estimate
    1160 – Ongoing
  16. 1120 (±75 yrs)VEI ?Geological estimate
    1120 – Ongoing
  17. 1030 (±75 yrs)VEI ?Geological estimate
    1030 – Ongoing
  18. 720 (±75 yrs)VEI ?Geological estimate
    720 – Ongoing
  19. 640 (±75 yrs)VEI ?Geological estimate
    640 – Ongoing
  20. 580 (±75 yrs)VEI ?Geological estimate
    580 – Ongoing
  21. 520 (±75 yrs)VEI ?Geological estimate
    520 – Ongoing
  22. 440 (±75 yrs)VEI ?Geological estimate
    440 – Ongoing
  23. 290 (±75 yrs)VEI ?Geological estimate
    290 – Ongoing
  24. 190 (±75 yrs)VEI ?Geological estimate
    190 – Ongoing
  25. 110 (±50 yrs)VEI ?Geological estimate
    110 – Ongoing
  26. 70 (±75 yrs)VEI ?Geological estimate
    70 – Ongoing
  27. 90 BCE (±75 yrs)VEI ?Geological estimate
    BCE 90 – Ongoing
  28. 100 BCE (±75 yrs)VEI ?Geological estimate
    BCE 100 – Ongoing
  29. 160 BCE (±75 yrs)VEI ?Geological estimate
    BCE 160 – Ongoing
  30. 210 BCE (±200 yrs)VEI ?Geological estimate
    BCE 210 – Ongoing
  31. 220 BCE (±75 yrs)VEI ?Geological estimate
    BCE 220 – Ongoing
  32. 270 BCE (±75 yrs)VEI ?Geological estimate
    BCE 270 – Ongoing
  33. 350 BCE (±75 yrs)VEI ?Geological estimate
    BCE 350 – Ongoing
  34. 380 BCE (±75 yrs)VEI ?Geological estimate
    BCE 380 – Ongoing
  35. 390 BCE (±75 yrs)VEI ?Geological estimate
    BCE 390 – Ongoing
  36. 400 BCE (±75 yrs)VEI ?Geological estimate
    BCE 400 – Ongoing
  37. 420 BCE (±75 yrs)VEI ?Geological estimate
    BCE 420 – Ongoing
  38. 450 BCE (±75 yrs)VEI ?Geological estimate
    BCE 450 – Ongoing
  39. 470 BCE (±75 yrs)VEI ?Geological estimate
    BCE 470 – Ongoing
  40. 600 BCE (±75 yrs)VEI ?Geological estimate
    BCE 600 – Ongoing
  41. 610 BCE (±100 yrs)VEI ?Geological estimate
    BCE 610 – Ongoing
  42. 620 BCE (±100 yrs)VEI ?Geological estimate
    BCE 620 – Ongoing
  43. 670 BCE (±100 yrs)VEI ?Geological estimate
    BCE 670 – Ongoing
  44. 770 BCE (±100 yrs)VEI ?Geological estimate
    BCE 770 – Ongoing
  45. 790 BCE (±100 yrs)VEI ?Geological estimate
    BCE 790 – Ongoing
  46. 830 BCE (±100 yrs)VEI ?Geological estimate
    BCE 830 – Ongoing
  47. 870 BCE (±100 yrs)VEI ?Geological estimate
    BCE 870 – Ongoing
  48. 1040 BCE (±100 yrs)VEI ?Geological estimate
    BCE 1040 – Ongoing
  49. 1050 BCEVEI ?Geological estimate
    BCE 1050 – Ongoing
  50. 1080 BCE (±150 yrs)VEI ?Geological estimate
    BCE 1080 – Ongoing
  51. 1100 BCE (±100 yrs)VEI ?Geological estimate
    BCE 1100 – Ongoing
  52. 1150 BCE (±100 yrs)VEI ?Geological estimate
    BCE 1150 – Ongoing
  53. 1210 BCE (±100 yrs)VEI ?Geological estimate
    BCE 1210 – Ongoing
  54. 1310 BCE (±100 yrs)VEI ?Geological estimate
    BCE 1310 – Ongoing
  55. 1350 BCE (±100 yrs)VEI ?Geological estimate
    BCE 1350 – Ongoing
  56. 1510 BCE (±100 yrs)VEI ?Geological estimate
    BCE 1510 – Ongoing
  57. 1540 BCE (±100 yrs)VEI ?Geological estimate
    BCE 1540 – Ongoing
  58. 1550 BCE (±150 yrs)VEI ?Geological estimate
    BCE 1550 – Ongoing
  59. 1560 BCE (±100 yrs)VEI ?Geological estimate
    BCE 1560 – Ongoing
  60. 1690 BCE (±100 yrs)VEI ?Geological estimate
    BCE 1690 – Ongoing
  61. 1700 BCE (±100 yrs)VEI ?Geological estimate
    BCE 1700 – Ongoing
  62. 1810 BCE (±150 yrs)VEI ?Geological estimate
    BCE 1810 – Ongoing
  63. 1870 BCE (±150 yrs)VEI ?Geological estimate
    BCE 1870 – Ongoing
  64. 2040 BCE (±150 yrs)VEI ?Geological estimate
    BCE 2040 – Ongoing
  65. 2230 BCE (±150 yrs)VEI ?Geological estimate
    BCE 2230 – Ongoing
  66. 2350 BCE (±150 yrs)VEI ?Geological estimate
    BCE 2350 – Ongoing
  67. 2830 BCE (±200 yrs)VEI ?Geological estimate
    BCE 2830 – Ongoing
  68. 2860 BCE (±200 yrs)VEI ?Geological estimate
    BCE 2860 – Ongoing
  69. 2920 BCE (±200 yrs)VEI ?Geological estimate
    BCE 2920 – Ongoing
  70. 3030 BCE (±200 yrs)VEI ?Geological estimate
    BCE 3030 – Ongoing
  71. 3150 BCE (±200 yrs)VEI ?Geological estimate
    BCE 3150 – Ongoing
  72. 3180 BCE (±200 yrs)VEI ?Geological estimate
    BCE 3180 – Ongoing
  73. 3600 BCE (±150 yrs)VEI ?Geological estimate
    BCE 3600 – Ongoing
  74. 3650 BCE (±150 yrs)VEI ?Geological estimate
    BCE 3650 – Ongoing
  75. 3690 BCE (±150 yrs)VEI ?Geological estimate
    BCE 3690 – Ongoing
  76. 3730 BCE (±150 yrs)VEI ?Geological estimate
    BCE 3730 – Ongoing
  77. 3890 BCE (±150 yrs)VEI ?Geological estimate
    BCE 3890 – Ongoing
  78. 4010 BCE (±150 yrs)VEI ?Geological estimate
    BCE 4010 – Ongoing
  79. 4360 BCE (±150 yrs)VEI ?Geological estimate
    BCE 4360 – Ongoing
  80. 4510 BCE (±150 yrs)VEI ?Geological estimate
    BCE 4510 – Ongoing
  81. 4810 BCE (±150 yrs)VEI ?Geological estimate
    BCE 4810 – Ongoing
  82. 4900 BCE (±150 yrs)VEI ?Geological estimate
    BCE 4900 – Ongoing
  83. 4960 BCE (±150 yrs)VEI ?Geological estimate
    BCE 4960 – Ongoing
  84. 5240 BCE (±150 yrs)VEI ?Geological estimate
    BCE 5240 – Ongoing
  85. 5580 BCE (±150 yrs)VEI ?Geological estimate
    BCE 5580 – Ongoing
  86. 5820 BCE (±150 yrs)VEI ?Geological estimate
    BCE 5820 – Ongoing
  87. 5910 BCE (±150 yrs)VEI ?Geological estimate
    BCE 5910 – Ongoing
  88. 5940 BCE (±150 yrs)VEI ?Geological estimate
    BCE 5940 – Ongoing
  89. 5950 BCE (±150 yrs)VEI ?Geological estimate
    BCE 5950 – Ongoing
  90. 6050 BCE (±150 yrs)VEI ?Geological estimate
    BCE 6050 – Ongoing
  91. 6150 BCE (±150 yrs)VEI ?Geological estimate
    BCE 6150 – Ongoing
  92. 6190 BCE (±150 yrs)VEI ?Geological estimate
    BCE 6190 – Ongoing
  93. 6280 BCE (±150 yrs)VEI ?Geological estimate
    BCE 6280 – Ongoing
  94. 7210 BCE (±200 yrs)VEI ?Geological estimate
    BCE 7210 – Ongoing
  95. 7270 BCE (±200 yrs)VEI ?Geological estimate
    BCE 7270 – Ongoing
  96. 7380 BCE (±200 yrs)VEI ?Geological estimate
    BCE 7380 – Ongoing
  97. 7430 BCE (±200 yrs)VEI ?Geological estimate
    BCE 7430 – Ongoing
  98. 7800 BCE (±200 yrs)VEI ?Geological estimate
    BCE 7800 – Ongoing
  99. 9310 BCE (±300 yrs)VEI ?Geological estimate
    BCE 9310 – Ongoing

External links

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