DOI-USGS-AVO-2009-10-16T12:06:46-08:00 avo-sci@usgs.gov 2009-10-16 12:06:46 Actual Alert Public http://www.avo.alaska.edu/activity/ Geo Volcanic activity Unknown Unknown Unknown 2009-10-16 12:06:46 2009-10-17 12:06:46 Alaska Volcano Observatory Cleveland Weekly Update No eruptive activity has been observed at Cleveland since the brief eruption at approximately 2330 AKDT October 2 (0730 UTC October 3). Although mostly obscured by clouds this week, clear nighttime satellite views of Cleveland on October 14 showed no signs of activity. 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. 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. http://www.avo.alaska.edu/activity/Cleveland.php Tom Murray, Scientist-in-Charge, USGS tlmurray@usgs.gov (907) 786-7497 Steve McNutt, Coordinating Scientist, UAF steve@giseis.alaska.edu (907) 474-7131 Volcano Alert Level=ADVISORY Aviation Color Code=YELLOW Cleveland volcano Alaska Aleutians 52.8222 -169.945 CAVW=1101-24-