Neptune
Facts
- Seismically Monitored: No
- Color Code:
- Alert Level:
- Elevation: 681m (2234ft)
- Latitude: 54.737085
- Longitude: -164.485754
- Smithsonian VNum:
- Pronunciation:
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Nearby Towns:
- False Pass 44 mi (70 km) NE
- Akutan 66 mi (107 km) SW
- Pauloff Harbor 74 mi (119 km) SE
- Cold Bay 77 mi (123 km) NE
- King Cove 89 mi (144 km) NE
Distance from Anchorage: 695 mi (1118 km)
Description
From Stelling and others, 2005 [1] : "An isolated polygenetic stratocone outside the caldera to the northwest, here named Neptune Cone ("NC") lacks deposits from the caldera-forming eruption, suggesting a Holocene age. The most recent eruption from this cone was a fissure eruption that produced a ~4 km-long linear ridge of basaltic (49 wt.% SiO2, Mg#=0.57), scoria and spatter, extending to the north of the cone ("arm" extending from Neptune Cone)."References Cited
[1] Eruptive history of Fisher Caldera, Alaska, USA, 2005
Stelling, P., Gardner, J. E., and Beget, J., 2005, Eruptive history of Fisher Caldera, Alaska, USA: Journal of Volcanology and Geothermal Research, v. 139, no. 3-4, p. 163-183.Loading Past Activity...
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Before an eruption
Ashfall & Preparedness Information
- Ashfall impacts & preparedness (US Geological Survey)
- Volcanic health hazards & impacts (International Volcanic Health Hazards Network)
- Ash Alert! Pamphlet (AK Division of Homeland Security & Emergency Management)
- Volcanic Ashfall (AK Department of Environmental Conservation, Division of Air Quality)
During and After an Eruption
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![Instrument data]()