|(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)|
|(3) Volcano:||Cleveland (CAVW# 1101-24-)|
|(4) Current Color Code:||YELLOW|
|(5) Previous Color Code:|
|(6) Source:||Alaska Volcano Observatory|
|(7) Notice Number:||2009/A46|
|(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:||No additional eruptive activity has been observed at Cleveland since the brief eruption at approximately 2330 AKDT October 2 (0730 UTC October 3). Clear satellite views from this morning show nothing unusual at the volcano. Thus we are lowering the aviation color code and volcano alert level to YELLOW/ADVISORY.|
The October 2 eruption produced a small, detached ash cloud at maximum altitudes of 15,000' to 20,000' (4.5 - 6.1 km). Such events are typical of Cleveland activity. While no more events have been detected, further eruptive activity is possible at any time.
The lack of a real-time seismic network at Cleveland means that AVO is unable to track local earthquake activity related to volcanic unrest. Short-lived explosions with ash plumes that could exceed 20,000 ft above sea level can occur without warning and may go undetected on satellite imagery.
Note: In the initial notification of this event and two subsequent status reports, the event's date was incorrectly stated as "0730 UTC (2330 AKDT) 02 October 2009."
|(12) Volcanic cloud height:||Unknown|
|(13) Other volcanic cloud information:||Unknown|
|(14) Remarks:||Cleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and it produced 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. The 2001 eruption also produced a rubbly lava flow and hot avalanche that reached the sea. The most recent minor ash emissions were observed in January and June 2009.|
|(15) Contacts:||John Power, Acting Scientist-in-Charge, USGS|
email@example.com (907) 786-7497
Steve McNutt, Coordinating Scientist, UAF
firstname.lastname@example.org (907) 474-7131
|(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|