Report on Cleveland (United States) — 14 March-20 March 2001
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 14 March-20 March 2001
Managing Editor: Gari Mayberry
Please cite this report as:
Global Volcanism Program, 2001. Report on Cleveland (United States). In: Mayberry, G (ed.), Weekly Volcanic Activity Report, 14 March-20 March 2001. Smithsonian Institution and US Geological Survey.
52.825°N, 169.944°W; summit elev. 1730 m
All times are local (unless otherwise noted)
The AVO reported that at 1430 on 19 March an explosive eruption at Cleveland was detected on satellite imagery. The National Weather Service estimated the top of the cloud to be at ~ 9 km a.s.l. An observer in the town of Nikolski reported that at about 1900 a strong haze resulting from the eruption extended SE from the volcano, but there was no ashfall. The Washington VAAC concluded that the ash cloud had dissipated by 0230 on 20 March because it was no longer visible on satellite imagery.
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.