(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:(20120830/1220Z)
(3) Volcano:Little Sitkin (CAVW# 1101-05-)
(4) Current Color Code:YELLOW
(5) Previous Color Code:unassigned
(6) Source:Alaska Volcano Observatory
(7) Notice Number:2012/A10
(8) Volcano Location:N 51 deg 57 min E 178 deg 32 min
(9) Area:Aleutians Alaska
(10) Summit Elevation:3898 ft (1188 m)
(11) Volcanic Activity Summary:At approximately 19:15 AKDT (04:15 UTC) last night, a swarm of high-frequency earthquakes began at Little Sitkin Volcano. The continuation of this anomalous seismic activity through the night prompts AVO to raise the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY. No eruptive activity is currently indicated.

AVO is closely monitoring the situation and will issue further updates as conditions changes.

Little Sitkin is monitored by a 4-station seismic network as well as satellite imagery. Little Sitkin Island is located 35 km (21 mi) northwest of Amchitka and 320 km (200 mi) west of Adak in the remote western Aleutian Islands. The last eruption of Little Sitkin is questionable and may have been in the early 1900s.
(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

Jeff Freymueller, Acting Coordinating Scientist, UAFGI
jeff@giseis.alaska.edu (907) 474-7286
(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