Report on Cleveland (United States) — 23 November-29 November 2005
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 23 November-29 November 2005
Managing Editor: Gari Mayberry
Please cite this report as:
Global Volcanism Program, 2005. Report on Cleveland (United States). In: Mayberry, G (ed.), Weekly Volcanic Activity Report, 23 November-29 November 2005. Smithsonian Institution and US Geological Survey.
52.825°N, 169.944°W; summit elev. 1730 m
All times are local (unless otherwise noted)
Activity at Cleveland further decreased during 18-25 November. Following a brief ash burst on 7 October, no further ash emissions were noted. AVO did not detect a temperature anomaly in the vicinity of the volcano after 6 November. Based on this information, AVO concluded that the likelihood of significant ash-producing events decreased, so they terminated Concern Color Code Yellow. Cleveland is not monitored with seismic equipment, therefore AVO did not assign Color Concern Code Green.
Geologic Background. The beautifully symmetrical Mount Cleveland stratovolcano is situated at the western end of the uninhabited Chuginadak Island. It lies SE across Carlisle Pass strait from Carlisle volcano and NE across Chuginadak Pass strait from Herbert volcano. Joined to the rest of Chuginadak Island by a low isthmus, Cleveland is the highest of the Islands of the Four Mountains group and is one of the most active of the Aleutian Islands. The native name, Chuginadak, refers to the Aleut goddess of fire, who was thought to reside on the volcano. Numerous large lava flows descend the steep-sided flanks. It is possible that some 18th-to-19th century eruptions attributed to Carlisle should be ascribed to Cleveland (Miller et al., 1998). In 1944 Cleveland produced the only known fatality from an Aleutian eruption. Recent eruptions have been characterized by short-lived explosive ash emissions, at times accompanied by lava fountaining and lava flows down the flanks.