(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:	(20151014/1741Z)
(3) Volcano:	Cleveland (VNUM #311240)
(4) Current Color Code:	YELLOW
(5) Previous Color Code:	ORANGE
(6) Source:	Alaska Volcano Observatory
(7) Notice Number:	2015/A7
(8) Volcano Location:	N 52 deg 49 min W 169 deg 56 min
(9) Area:	Aleutians
(10) Summit Elevation:	5676 ft (1730 m)
(11) Volcanic Activity Summary:	Strongly elevated surface temperatures have not been observed at Cleveland since August 18. Moderately elevated surface temperatures have been observed with decreasing regularity since then, with the most recent instance occurring on September 30. This indicates lava effusion at the summit has likely ceased. In addition, explosive activity, as detected by infrasound, last occurred over two months ago on August 6. Based on the decline in activity, we are lowering the Level of Concern Color Code to YELLOW and the Alert Level to ADVISORY. Cleveland is one of the most active volcanoes of the Aleutian Arc. The latest eruptive phase has waxed and waned almost annually since 2001. Renewed explosive activity and unrest could begin again with little to no precursory warning. Two seismic stations were installed at the volcano during the summer of 2014, and AVO will continue to closely monitor the volcano using seismic and infrasound data, as well as daily satellite and web camera image analysis.
(12) Volcanic cloud height:	Unknown
(13) Other volcanic cloud information:	Unknown
(14) Remarks:
(15) Contacts:	John Power, Scientist-in-Charge, USGS jpower@usgs.gov (907) 786-7497 Jessica Larsen, Acting Coordinating Scientist, UAFGI faust@gi.alaska.edu (907) 322-4085
(16) Next Notice:	A new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http://www.avo.alaska.edu

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AVO/USGS Volcanic Activity Notice

Volcano: Cleveland (VNUM #311240)

Current Volcano Alert Level: ADVISORY
Previous Volcano Alert Level: WATCH

Current Aviation Color Code: YELLOW
Previous Aviation Color Code: ORANGE

Issued: Wednesday, October 14, 2015, 9:41 AM AKDT
Source: Alaska Volcano Observatory
Notice Number: 2015/A7
Location: N 52 deg 49 min W 169 deg 56 min
Elevation: 5676 ft (1730 m)
Area: Aleutians

Volcanic Activity Summary: Strongly elevated surface temperatures have not been observed at Cleveland since August 18. Moderately elevated surface temperatures have been observed with decreasing regularity since then, with the most recent instance occurring on September 30. This indicates lava effusion at the summit has likely ceased. In addition, explosive activity, as detected by infrasound, last occurred over two months ago on August 6. Based on the decline in activity, we are lowering the Level of Concern Color Code to YELLOW and the Alert Level to ADVISORY.

Cleveland is one of the most active volcanoes of the Aleutian Arc. The latest eruptive phase has waxed and waned almost annually since 2001. Renewed explosive activity and unrest could begin again with little to no precursory warning. Two seismic stations were installed at the volcano during the summer of 2014, and AVO will continue to closely monitor the volcano using seismic and infrasound data, as well as daily satellite and web camera image analysis.

Recent Observations:
[Volcanic cloud height] Unknown
[Other volcanic cloud information] Unknown

Contacts: John Power, Scientist-in-Charge, USGS
jpower@usgs.gov (907) 786-7497

Jessica Larsen, Acting Coordinating Scientist, UAFGI
faust@gi.alaska.edu (907) 322-4085

Next Notice: A new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at
http://www.avo.alaska.edu

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