(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:(20090102/2151Z)
(3) Volcano:Cleveland (CAVW# 1101-24-)
(4) Current Color Code:YELLOW
(5) Previous Color Code:
(6) Source:Alaska Volcano Observatory
(7) Notice Number:2009/A1
(8) Volcano Location:N 52 deg 49 min W 169 deg 56 min
(9) Area:Aleutians Alaska
(10) Summit Elevation:5676 ft (1730 m)
(11) Volcanic Activity Summary:A brief but explosive ash emission was detected in satellite images of Cleveland Volcano this morning. An ash plume was apparent in images obtained at 1645 UTC, 1809 UTC, 1812 UTC, and 1823 UTC. The ash plume reached an altitude of about 6 km (20,000 ft) drifted east-southeast about 240 km (150 mi) and dispersed over the North Pacific.
(12) Volcanic cloud height:Unknown
(13) Other volcanic cloud information:Unknown
(14) Remarks:This was a brief, short-lived, but explosive ash emission event from Cleveland Volcano and is typical of the type of events observed at this volcano in the past. Because the event was brief and the ash plume was relatively low level and dispersed rapidly AVO is not raising the color code or alert level.
(15) Contacts:Tom Murray, Scientist-in-Charge, USGS
tlmurray@usgs.gov (907) 786-7497

Jon Dehn, Acting Coordinating Scientist, UAFGI
jdehn@gi.alaska.edu (907) 474-6499
(16) Next Notice:A new VONA will be issued if conditions change significantly or alert levels are modified. While a VONA is in effect, regularly scheduled updates are posted at http://www.avo.alaska.edu