Augustine
Red (Warning) | |
Orange (Watch) | |
Yellow (Advisory) | |
Green (Normal) | |
Uninstrumented | |
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Instrument | |
Earthquake |
Facts
- Official Name: Augustine Volcano
- Seismically Monitored: Yes
- Color Code: GREEN
- Alert Level: NORMAL
- Elevation: 1260m (4133ft)
- Latitude: 59.3626
- Longitude: -153.435
- Smithsonian VNum: 313010
- Pronunciation:
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Nearby Towns:
- Pedro Bay 38 mi (60 km) NW
- Pope-Vannoy Landing 39 mi (64 km) NW
- Kokhanok 47 mi (75 km) NW
- Nanwalek 53 mi (86 km) SE
- Port Graham 57 mi (91 km) SE
Distance from Anchorage: 176 mi (284 km)
Description
From Miller and others (1998) [1] : "Augustine Island, an 8 by 11 km island in lower Cook Inlet, is composed almost entirely of the deposits of Augustine Volcano. Jurassic and Cretaceous sedimentary strata form a bench on the south side of the island and are overlain by granitoid glacial erratics and volcanic hyaloclastites. The volcano consists of a central dome and lava flow complex, surrounded by pyroclastic debris. The irregular coastline of Augustine Island is due to the repeated catastrophic collapse of the summit dome, forming debris avalanches down the flanks and into Cook Inlet. At least 11 avalanches have occurred in the past 2000 years with an average recurrence interval of about 150-200 years [2] [3] ."Augustine lies within the area of uplift resulting from the 1964 Alaska earthquake; 30-33 cm of uplift was measured on the northwest side of the island [4] . A 25-meter-high, south-facing submarine scarp 3 km south of the island, of similar orientation to joint sets in sedimentary rocks of the Kamishak River area (on the Alaska Peninsula), is almost certainly of tectonic origin."
Name Origin
The volcanic peak on Augustine Island was named "Mount San Augustine" in an 1867 U.S. Coast and Geodetic Survey report, and "Mount Chinabora" on a 1928 U.S. Post Route map. Captain James Cook named the island "Saint Augustine Island" in 1778 because it was sighted on St. Augustine's Day (Orth, 1971). In recent years, the "Saint" has been dropped from the name of both the island and the volcano; the volcano's formal name is "Augustine Volcano." Tebenkov (1852) called the island "O[strov] Chernoburoy", meaning "black brown" (Orth, 1971).
References Cited
[1] Catalog of the historically active volcanoes of Alaska, 1998
Miller, T. P., McGimsey, R. G., Richter, D. H., Riehle, J. R., Nye, C. J., Yount, M. E., and Dumoulin, J. A., 1998, Catalog of the historically active volcanoes of Alaska: U.S. Geological Survey Open-File Report 98-0582, 104 p.
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[2] Cyclic formation of debris avalanches at Mount St Augustine volcano, 1992
Beget, J. E., and Kienle, J., 1992, Cyclic formation of debris avalanches at Mount St Augustine volcano: Nature, v. 356, n. 6371, p. 701-704.[3] Preliminary volcano-hazard assessment for Iliamna Volcano, Alaska, 1999
Waythomas, C. F., and Miller, T. P., 1999, Preliminary volcano-hazard assessment for Iliamna Volcano, Alaska: U.S. Geological Survey Open-File Report 99-0373, 31 p., 1 sheet, scale unknown.
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[4] Recent volcanic activity on Augustine Island, Alaska, 1968
Detterman, R. L., 1968, Recent volcanic activity on Augustine Island, Alaska: in Geological Survey research 1968, Chapter C, U.S. Geological Survey Professional Paper PP 0600-C, p. C126-C129.
Current Activity
Recent Updates
Webcams
Webicorder
Geodesy Sensors
Color Code Timeline
Ashfall and ash cloud forecasts: Model output
Reported Activity
Modern Eruptions
52 Event Date(s)
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Eruption |
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Questionable eruption |
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Non-eruptive activity |
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2016: Augustine unrest 2016
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2015: Augustine 2015
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2005: Augustine 2005/12
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2003: Augustine 2003/9
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1998: Augustine 1998/7
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1988: Augustine 1988
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1986: Augustine 1986/3
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1976: Augustine 1976/1
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1971: Augustine 1971/9
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1963: Augustine 1963/10
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1944: Augustine 1944
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1935: Augustine 1935/3
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1908: Augustine 1908/3
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1902: Augustine 1902
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1895: Augustine 1895
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1893: Augustine 1893
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1885: Augustine 1885
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1883: Augustine 1883/10
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1812: Augustine 1812
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300 yBP: Augustine Young Domes
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300 yBP: Augustine Grouse Point Debris Avalanche
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300 yBP: Augustine Prehistoric Lava Flow
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300 yBP: Augustine Rocky Point Debris Avalanche
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300 yBP: Augustine West Island Debris Avalanche
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390 yBP: Augustine Tephra B
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760 yBP: Augustine Southeast Beach Debris Avalanche
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760 yBP: Augustine West Lagoon Pyroclastic Flow/Lahar
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770 yBP: Augustine West Lagoon Debris Avalanche
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1000 yBP: Augustine Lahar West of Southeast Point
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1000 yBP: Augustine Pyroclastic Flow West of Augustine Creek
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1000 yBP: Augustine Tephra M
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1100 yBP: Augustine Tephra C
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1195 yBP: Augustine Tephra O
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1450 yBP: Augustine Tephra H
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1470 yBP: Augustine Long Beach Debris Avalanche
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1470 yBP: Augustine Long Beach Pyroclastic Flow
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1470 yBP: Augustine North Bench Debris Avalanche
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1470 yBP: Augustine South Point Debris Avalanche
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1470 yBP: Augustine Southeast Pyroclastic Fan
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1625 yBP: Augustine Homer Ash
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1700 yBP: Augustine Tephra I
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1725 yBP: Augustine Northeast Bench Debris Avalanche or Lahar
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1725 yBP: Augustine Northeast Point Debris Avalanche
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2100 yBP: Augustine Tephra G
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2160 yBP: Augustine Southeast Point Debris Avalanche
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2160 yBP: Augustine Yellow Cliffs Debris Avalanche
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3620 yBP: Augustine Shuyak Island Ash 3
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3850 yBP: Augustine Kamishak Creek Tephra
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5330 yBP: Augustine Shuyak Island Ash 2
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6460 yBP: Augustine Shuyak Island Ash
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7730 yBP: Augustine ECR-100 Tephra
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8375 yBP: Augustine Crooked Creek Tephra
Loading Images...
Map Images

This map depicts the hazards on Augustine Island associated with the 2006 eruption as of April 2006. This assessment is based on the current, relatively low level of volcanic activity. It will be updated as the situation warrants due to increased (or decreased) volcanic activity or seasonal changes.

This map shows the new deposits from the current Augustine eruption, as of mid-April 2006. It was created using aerial observations, photos, satellite images, and limited field work. Revisions will likely occur after more extensive field work is conducted this coming summer.
Map References
Recently active volcanoes of Alaska, 2023
Tephra occurrence in Alaska: a map-based compilation of stratigraphic tephra data, 2018
Historically active volcanoes of Alaska, v. 3, 2018
Historically active volcanoes of Alaska, 2014
Database for volcanic processes and geology of Augustine Volcano, Alaska: database for Professional Paper 1762, 2012
The 2006 eruption of Augustine Volcano, Alaska, 2010
Timing, distribution, and volume of proximal products of the 2006 eruption of Augustine Volcano, 2010
Preliminary geologic map of the Cook Inlet Region, Alaska - including parts of the Talkeetna, Talkeetna Mountains, Tyonek, Lake Clark, Kenai, Seward, Iliamna, Seldovia, Mount Katmai, and Afognak 1:250,000-scale Quadrangles, 2009
Volcanic processes and geology of Augustine Volcano, Alaska, 2009
Historically active volcanoes of the Aleutian Arc, 2002
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Volcanoes of Alaska, 1998
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Preliminary volcano-hazard assessment for Augustine Volcano, Alaska, 1998
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Provisional geologic map of Augustine Volcano, Alaska, 1996
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Catalog and initial analyses of geologic data related to middle and late Quaternary deposits, Cook Inlet region, Alaska, 1996
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Volcanoes of Alaska, 1995
Aleutian arc volcanoes, 1994
This dynamic planet: world map of volcanoes, earthquakes, impact craters, and plate tectonics, 1994
Geothermal resources of the Aleutian Arc, 1993
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Holocene volcanoes of the Aleutian Arc, Alaska, 1993
Map showing distribution, composition, and age of Late Cenozoic volcanic centers in Alaska, 1986
Volcanic hazards from future eruptions of Augustine Volcano, Alaska, 1980
Geologic map of Alaska, 1980
Volatiles, magma mixing, and the mechanism of eruption at Augustine volcano, Alaska, 1978
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Geologic map of south Augustine Island, Lower Cook Inlet, Alaska, 1976
Geologic map of the Iliamna B-2 Quadrangle, Augustine Island, Alaska, 1973
Geology of the Iliamna quadrangle, Alaska, 1968
Preliminary map of the geology of the Iliamna quadrangle, Alaska, 1964
Volcanic activity in the Aleutian Arc, 1950
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Reconnaissance of the gold fields of southern Alaska with some notes on general geology, 1898
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