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ALASKA VOLCANO OBSERVATORY
Friday, May 31, 2002 12:00 AM ADT (2000 UT)
GREAT SITKIN VOLCANO
52°05'N 176°08'W, Summit Elevation: 5,710 ft (1,740 m)
Current Level of Concern Color Code: GREEN
Seismicity at Great Sitkin has decreased significantly since May 28. Aftershocks from the large earthquake on 05/28 (revised ML of 4.3) have declined, and no tremor episodes have been detected since May 27. Great Sitkin continues to be at color code GREEN. This will be the last report on seismicity at Great Sitkin unless increased activity is observed.
Seismic activity is monitored in real time at 23 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.
Wrangell, Spurr, Redoubt, Iliamna, Augustine, Snowy, Griggs, Katmai, Novarupta, Trident, Mageik, Martin, Aniakchak, Pavlof, Dutton, Isanotski, Shishaldin, Fisher, Westdahl, Akutan, Makushin, Great Sitkin, and Kanaga volcanoes are in color code GREEN. All are at or near normal levels of background seismicity. AVO did not detect ash plumes or significant elevated surface temperatures in the vicinity of any volcano.