DOI-USGS-AVO-2009-11-17T11:20:46-09:00 avo-sci@usgs.gov 2009-11-17 11:20:46 Actual Update Public http://www.avo.alaska.edu/activity/ Geo Unknown Minor Unlikely 2009-11-17 11:20:46 2009-11-18 11:20:46 Alaska Volcano Observatory Information Statement AVO can no longer seismically monitor the following volcanoes because of seismic station outages. As a result, AVO is unable to (1) assess whether these volcanoes may be building towards an eruption and (2) quickly confirm or dismiss reports of activity at these volcanoes. <b> Veniaminof Aniakchak Fourpeaked Korovin</b> Because these volcanoes are no longer seismically monitored, they will move from volcano alert level <b>Normal</b> and aviation color code <b>Green</b> to "<b>unassigned</b>". They will likely remain without real-time seismic monitoring until next summer, when necessary upgrades at these and other networks will occur. As at other volcanoes without real-time seismic networks, AVO will continue to use satellite data and reports from pilots and ground observers to detect signs of eruptive activity. MONITORED ALASKAN VOLCANOES Seismic activity is monitored in real time at 27 volcanoes in Alaska. Satellite images of all Alaskan volcanoes are analyzed daily for evidence of ash plumes and elevated surface temperatures. Some volcanoes may currently display anomalous behavior but are not considered to be at a dangerous level of unrest. Akutan, Augustine, Dutton, Fisher, Gareloi, Great Sitkin, Griggs, Iliamna, Isanotski, Kanaga, Katmai, Mageik, Makushin, Martin, Novarupta, Okmok, Pavlof, Redoubt, Shishaldin, Snowy, Spurr, Tanaga, Trident, Ugashik-Peulik, Ukinrek Maars, Westdahl, and Wrangell volcanoes are in color code GREEN and volcano alert level Normal. All are at or near normal levels of background seismicity. Please see http://www.avo.alaska.edu/color_codes.php for complete definitions of Aviation color codes and Volcano alert levels. VOLCANO INFORMATION ON THE INTERNET: http://www.avo.alaska.edu RECORDING ON THE STATUS OF ALASKA'S VOLCANOES (907) 786-7478 http://www.avo.alaska.edu Tom Murray, Scientist-in-Charge, USGS tlmurray@usgs.gov (907) 786-7497 Ken Dean, Acting Coordinating Scientist, UAF kdean@gi.alaska.edu (907) 474-7364 Volcano Alert Level=NORMAL Aviation Color Code=GREEN volcano CAVW=