Cleveland volcano (Aleutian Islands): new activity of lava dome growth observed, AVO raises alert level
Wednesday Feb 01, 2012 01:01 AM | BY: T
Cleveland Volcano (Aleutian Islands) is showing renewed activity, which was observed in satellite data, and AVO is raising the Aviation Color Code to Orange and the Alert Level to Watch. A new lava dome has been observed in the summit crater, and as of 30 January 2012 was approximately 40 meters (130 feet) in diameter. There have been no observations of ash emissions or explosive activity during this current lava eruption.
The lava dome that formed throughout the fall-winter of 2011 was largely removed by the explosive activity on 25 and 29 December, 2011. It remains possible for intermittent, sudden explosions of blocks and ash to occur at any time, and ash clouds exceeding 20,000 feet above sea level may develop. Such explosions and their associated ash clouds may go undetected in satellite imagery for hours. If a large, explosive, ash-producing event occurs, seismic, infrasound, or volcanic lightning may be detected by local and regional monitoring networks. There is no real-time seismic monitoring network on Mount Cleveland.
Lidhje / Burimet:
Tuesday, Jan 03, 2012
The Alaska Volcano Observatory has lowered the alert level for Cleveland volcano from ORANGE (eruption imminent) to YELLOW (watch), after no activity has been detected at the volcano in the past days. ... [more]
Tuesday, Sep 14, 2010
An probable eruption at Cleveland volcano occured on 12 Sep 2010, producing an ash plume detected in satellite imagery that rose to the estimated altitude of 7.6 km (25,000 ft) a.s.l. and drifted E. ... [more]
Wednesday, Jun 02, 2010
AVO confirms that the event on 30 May was an eruption that produced an ash plume rising no higher than 4.9 km (16,000 ft) a.s.l. and drifting SW. [more]
Tuesday, Jun 01, 2010
The Alaska Volcano Observatory notes increased steaming activity from remote Cleveland volcano, one of the most active ones in the Aleutian chain. The volcano is currently not covered by a monitoring network, and has the potential of large explosive eruptions that could send ash to 10-20 km elevation. ... [more]
Thursday, Jul 24, 2008
A new eruption seems to have started at Cleveland volcano on 21 July. AVO raised the Volcano Alert Level as there were reports from pilots and fishing boats in the area, observing a new ash eruption that had started at about noon that day. Pilots reported that an ash-and-steam plume rose to ... [more]