Westdahl 1964/3
Start: March 10, 1964 [1]
Stop: April 16, 1964 [2]
Event Type: Explosive
Max VEI: 2 [1]
- Phreato-magmatic [2]
Description: Juergen Kienle's compiled notes on file at the Geophysical Institute, University of Alaska Fairbanks, state that Skinner reported in 1979 that during late 1964 to early 1965, 7 separate "blow holes" of ash on E-W line were active at Westdahl. He also states that across a plateau south of Pogromni, just before it slopes off to Bering Sea, there was activity for 1 week, there was a deep gully connecting all blow holes in snow field, and at the end of the week, the main fissure had completely stopped, but a new cone had formed 3 miles from the Bering Sea beach (with lava flow).
Reeder and Doukas (1994) report that Westdahl erupted in 1964-65, producing a fissure-fed lava flow that eventually covered 35 square kilometers.
Coats (1964) writes that tremors were reported at Scotch Cap, and that although there was lava, the composition is unknown. Coarse tephra was also produced. On April 16, the vent was only steaming slightly. Secondary fumaroles were seen on the lava flow.
The Associated Press produced an article on March 14, 1964: "A major new volcanic eruption was reported late Friday on Unimak Island in the Aleutian chain, with a two-mile river of lava flowing from the mountain's crater and debris hurled 2,000 feet into the air.
"The lava flow and spewing debris was reported by a Coast Guard plane flying a low-level survey about five miles east of Westdahl peak, on Pogromni volcano at the west end of Unimak."
Reeder and Doukas (1994) report that Westdahl erupted in 1964-65, producing a fissure-fed lava flow that eventually covered 35 square kilometers.
Coats (1964) writes that tremors were reported at Scotch Cap, and that although there was lava, the composition is unknown. Coarse tephra was also produced. On April 16, the vent was only steaming slightly. Secondary fumaroles were seen on the lava flow.
The Associated Press produced an article on March 14, 1964: "A major new volcanic eruption was reported late Friday on Unimak Island in the Aleutian chain, with a two-mile river of lava flowing from the mountain's crater and debris hurled 2,000 feet into the air.
"The lava flow and spewing debris was reported by a Coast Guard plane flying a low-level survey about five miles east of Westdahl peak, on Pogromni volcano at the west end of Unimak."
References Cited
[1] Volcanoes of the world [2nd edition], 1994
Simkin, Tom, and Siebert, Lee, 1994, Volcanoes of the world [2nd edition]: Tucson, Arizona, Geoscience Press, 349 p.[2] Aleutian Islands and Alaska, 1964
Coats, R. R., 1964, Aleutian Islands and Alaska: Bulletin of Volcanic Eruptions, v. 4, p. 4.[3] Westdahl, 1994
Reeder, J. W., and Doukas, M., 1994, Westdahl: in Annual report of the world volcanic eruptions in 1991, Bulletin of Volcanic Eruptions, v. 31, p. 83-86.[4] Volcano erupts, 1964
Associated Press, 1964, Volcano erupts: The Gettysburg Times, Gettysburg, PA, Saturday, March 14, 1964, p. 6.Complete Eruption References
Westdahl, 1994
Reeder, J. W., and Doukas, M., 1994, Westdahl: in Annual report of the world volcanic eruptions in 1991, Bulletin of Volcanic Eruptions, v. 31, p. 83-86.
Hard Copy held by AVO at FBKS - CEC file cabinet
Volcanoes of the world [2nd edition], 1994
Simkin, Tom, and Siebert, Lee, 1994, Volcanoes of the world [2nd edition]: Tucson, Arizona, Geoscience Press, 349 p.
Hard Copy held by AVO at FBKS - CEC shelf
Investigations at active volcanoes, 1967
Decker, R. W., 1967, Investigations at active volcanoes: Adams, L. H. and Schairer, J. F., (eds.), Eos, v. 48, n. 2, p. 639-647.
Hard Copy held by AVO at FBKS - CEC file cabinet
Aleutian Islands and Alaska, 1964
Coats, R. R., 1964, Aleutian Islands and Alaska: Bulletin of Volcanic Eruptions, v. 4, p. 4.
Hard Copy held by AVO at FBKS - CEC file cabinet
Volcano erupts, 1964
Associated Press, 1964, Volcano erupts: The Gettysburg Times, Gettysburg, PA, Saturday, March 14, 1964, p. 6.
Volcano observations,
Kienle, Juergen (comp.), Volcano observations: Notes about volcanoes and volcanic eruptions collected, made, and stored by Juergen Kienle, on file at University of Alaska Fairbanks, Geophysical Institute, unpublished, unpaged.
