Trident 1951/7
Start: July 7, 1951 ± 7 Days [1]
Event Type: Explosive
- Tephrafall [1]
Description: From Decker (1963): "Al Kropf, pilot with the U.S. Fish and Wildlife Service, reports ash eruptions from a fissure on the side of Mt. Trident were taking place during his aerial patrols to the Shelikof Straits in 1951. The aerial photographs (137 + 138 V10 VP-61 7-7-51 2252 21,200 NAE) taken on July 7, 1951, clearly show a radial fissure over 3000 feet long extending down the southwest flank of Mt. Trident. Fume was present from one vent along the fracture centered in a 2000 foot diameter patch of ash darker than the 1912 Katmai ash. These aerial photographs also show that no lava flows had taken place prior to July, 1951." However, Hildreth (1983) disbelieves this account: "Published compilations notwithstanding, there are no credible reports of historic eruptions in the Katmai group except at Novarupta in 1912 and at Trident in 1953 - 1968." The ash could be remobilized tephra from previous eruptions in the Katmai area.
References Cited
[1] Proposed volcano observatory at Katmai National Monument, 1963
Decker, R. W., 1963, Proposed volcano observatory at Katmai National Monument: in A preliminary study: Report to National Science Foundation, Hanover, NH, Dartmouth College, 54 p.[2] Volcano observations, 1954
Unknown, 1954, Volcano observations: Unpublished volcano observation sheets filled out by U.S. military and stored on file at the Geophyiscal Institute, University of Alaska Fairbanks, unpaged.Complete Eruption References
Geochemistry and petrology of the Mt. Trident andesites, Katmai National Monument, Alaska, 1967
Ray, D. K., 1967, Geochemistry and petrology of the Mt. Trident andesites, Katmai National Monument, Alaska: University of Alaska Fairbanks unpublished Ph.D. dissertation, 198 p.
Hard Copy held by AVO at FBKS - CEC file cabinet
Volcano observations, 1954
Unknown, 1954, Volcano observations: Unpublished volcano observation sheets filled out by U.S. military and stored on file at the Geophyiscal Institute, University of Alaska Fairbanks, unpaged.
Hard Copy held by AVO at FBKS - CEC file cabinet
Proposed volcano observatory at Katmai National Monument, 1963
Decker, R. W., 1963, Proposed volcano observatory at Katmai National Monument: in A preliminary study: Report to National Science Foundation, Hanover, NH, Dartmouth College, 54 p.
Hard Copy held by AVO at FBKS - CEC file cabinet
The compositionally zoned eruption of 1912 in the Valley of Ten Thousand Smokes, Katmai National Park, Alaska, 1983
Hildreth, Wes, 1983, The compositionally zoned eruption of 1912 in the Valley of Ten Thousand Smokes, Katmai National Park, Alaska: Journal of Volcanology and Geothermal Research, v. 18, n. 1-4, p. 1-56.
