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

Okmok reported activity

OKMOK LINKS

SAMPLES

Webicorders

Webcams
EVENT SPECIFIC INFORMATION

Event Name : Okmok 1824

Start: 1824 Observed
Stop: 1830 Observed

Lava flow: BibCard BibCard BibCard
Radial fissure: BibCard
Eruption Type:Explosive
Duration: Perhaps up to 6 years BibCard

Description: From Grey (2003): "According to Grewingk (1850, translated 2003 by Fritz Jaensch), Lutke reported an eruption on the northeast end of Umnak Island, during which a 'mountain ridge opened up' in 1824 and was still 'smoking' in 1830. He also says that Postels (in Lutke, 1836) erroneously reported the activity as stretching along the northwest coast, but does not mention on what basis this presumption of error is made - perhaps the eruption was merely viewed from off the NW coast and appeared nearer than it was. I interpret these two reports as describing a linear (fissure) eruption and postulate that it may have taken place along the chain of small vents within the caldera that extends west from Cone B. This assumes fire fountains reaching above the caldera rim (500 m or more in height)."

Grey (2003) explains that fire fountains this high are unlikely, and then continues as follows: "Perhaps the observer saw the red glow of the eruption reflected on the underside of a low cloud deck. The relative freshness of the deposits from this arcuate fissure supports a historic time frame. There is also a young lava flow from Cone B that is so fresh it was originally mistaken for 1958 lava during field work in 2000 and could have been erupted in this time frame as well."

Powers (1958) also states that he believes a lava flow likely occurred during this eruption.

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.