Report on Cleveland (United States) — June 1994
Bulletin of the Global Volcanism Network, vol. 19, no. 6 (June 1994)
Managing Editor: Richard Wunderman.
Cleveland (United States) Ashfall from 21 May eruption observed on the NE flank
Please cite this report as:
Global Volcanism Program, 1994. Report on Cleveland (United States) (Wunderman, R., ed.). Bulletin of the Global Volcanism Network, 19:6. Smithsonian Institution. https://doi.org/10.5479/si.GVP.BGVN199406-311240
52.825°N, 169.944°W; summit elev. 1730 m
All times are local (unless otherwise noted)
On 21 June, AVO observers noted a broad, black swath of material extending from within a few hundred meters of the summit well down the NE flank. A vigorous white steam plume was being driven by wind down the ESE flank. The debris was presumed to be ash from the small  May eruption. FWS personnel aboard the RV Tiglax had observed the black swath earlier in the week.
Geological Summary. 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 it 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.
Information Contacts: AVO.