AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
About Alaska's Volcanoes | Hazards from Alaska's Volcanoes | Map & Alphabetical List | Interactive Map | Eruption Search | Volcano Search 
You are here: Home > Volcano Information

Great Sitkin reported activity

GREAT SITKIN LINKS

SAMPLES

Webicorders

Webcams
EVENT SPECIFIC INFORMATION

Event Name : Great Sitkin 1945/3

Start:March 1945 Observed

Lava flow: BibCard BibCard
Lava dome: BibCard BibCard BibCard
Subglacial: BibCard BibCard BibCard
Central eruption: BibCard BibCard
Eruption Type:Explosive
MaxVEI: 2 BibCard
Eruption Product: andesite BibCard
ChemYes
Othermafic

Description: From Simons and Mathewson (1947): "Extrusion of the crater dome marks the latest phase of activity. The dome is thought to have formed in March, 1945, at which time a glow was visible at night from Adak Island, and Army aviators noticed clouds of steam rising from the crater. During that month a strong earthquake was felt at Sand Bay."

From Coats (1950): lava flow or plug dome, some explosive activity at Great Sitkin in 1945.

Robinson (1948) includes a picture of the 1945 lava dome at Great Sitkin, captioned: "Mass of hot lava pushing up through snow in Great Sitkin Crater, may menace a near-by Navy fueling station. The dome of molten rock, half a mile in diameter, pushed and melted its way up through the white blanket in March, 1945, cracking the snow around its periphery. Steam rises from snow being melted by the lava."

Newhall and Melson (1983) estimate the volume of this dome at about 10 x 10^6 cubic meters.

Contact AVO Privacy Accessibility Information Quality FOIA
URL: avo.alaska.edu/volcanoes/activity.php
Page modified: March 30, 2017 14:36
Contact Information: AVO Web Team

twitter @alaska_avo
facebook alaska.avo
email Receive volcano updates by email: USGS VNS

This website is supported by the U.S. Geological Survey under Cooperative Agreement Grant G19AC00060 and G19AC00171.

Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey.