Volcanic Activity Summary:
No major activity has been observed at Cleveland Volcano since satellite data confirmed the eruption of a small volume lava dome within the summit crater on May 18. Weakly elevated surface temperatures have been detected in satellite data from the past day that are consistent with cooling lava and are not considered to be indicative of new activity. Seismic activity has remained low since explosions were detected in infrasound (pressure sensor) and seismic data on May 5 and May 10. Based on seismic levels remaining low and no observations nor reports of continued eruptive activity, AVO is reducing the Aviation color code to YELLOW and the Volcano Alert Level to ADVISORY.
Cleveland volcano forms the western portion of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. The volcano is located about 75 km (45 mi) west of the community of Nikolski, and 1500 km (940 mi) southwest of Anchorage. The most recent significant period of eruption began in February, 2001 and produced 3 explosive events that generated ash clouds as high as 39,000 ft above sea level. The 2001 eruption also produced a lava flow and hot avalanche that reached the sea. Since then, Cleveland has been intermittently active producing small lava flows, often followed by explosions that generate small ash clouds generally below 20,000 ft above sea level. These explosions also launch debris onto the slopes of the cone producing hot pyroclastic avalanches and lahars that sometimes reach the coastline.
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June 04 , 2016. Cleveland , Alaska :
AVO/USGS Volcanic Activity Notice
Current Volcano Alert Level: ADVISORY
Previous Volcano Alert Level: WATCH
Current Aviation Color Code: YELLOW
Previous Aviation Color Code: ORANGE
Issued: Friday, June 3, 2016, 11:12
Source: Alaska Volcano Observatory
Location: N 52 deg 49 min W 169 deg 56 min
Elevation: 5676 ft (1730 m)
Source : AVO
Photo : Lyons, John; Schmitt, Joe ( 2015)