ALASKA VOLCANO OBSERVATORY
Current Status Report
Thursday, April 5, 2007 12:00 PM AKDT (2000 UTC)
KOROVIN VOLCANO (ATKA ISLAND) (CAVW#1101-16)
52°22'48" N174°9'22" W, Summit Elevation 5030 ft (1533 m)
Current Aviation Color Code: YELLOW
Current Volcanic Activity Alert Level: Advisory
Intermittent, low-level seismic activity continues at Korovin. Clouds obscure views of the volcano by satellite today. AVO has received no new information about activity at Korovin today.
Korovin has erupted several times in the past 200 years, most recently in 1998. Eruptions typically produce minor amounts of ash and occasional, small lava flows. Ash plume heights could exceed 20,000 ft above sea level. Korovin occasionally produces large steam plumes from its summit.
VENIAMINOF VOLCANO (CAVW#1102-07-)
56°11'41" N159°23'24" W, Summit Elevation 8225 ft (2507 m)
Current Aviation Color Code: YELLOW
Current Volcanic Activity Alert Level: Advisory
Intermittent, low-level seismic activity continues at Veniaminof. Clouds obscure web camera views of the intracaldera cone today.
Short-lived, very small-volume steam and ash bursts from the intracaldera cone have been common over the past few years. Ash from these events is not likely to extend beyond the caldera rim. There are no indications that a larger eruption is imminent.
CLEVELAND VOLCANO (CAVW#1101-24-)
52°49'20" N169°56'42" W, Summit Elevation 5676 ft (1730 m)
Current Aviation Color Code: YELLOW
Current Volcanic Activity Alert Level: Advisory
Clouds obscure the volcano from satellite today. AVO has received no new information about activity at Cleveland.
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.
FOURPEAKED VOLCANO (CAVW#1102-26-)
58°46'9" N153°40'26" W, Summit Elevation 6903 ft (2104 m)
Current Aviation Color Code: YELLOW
Current Volcanic Activity Alert Level: Advisory
Intermittent, low-level seismic activity continues at Fourpeaked. Clouds obscure the web camera view today.
The age of the last significant eruption at Fourpeaked is not known. Because geological investigations have been limited and ice covers much of the area, the sizes and styles of past eruptions are not well-constrained. However, the composition of the volcano indicates that eruptions can be explosive, possibly producing plumes that reach in excess of 33,000 ft above sea level and local ash fall.
VOLCANO INFORMATION ON THE INTERNET: www.avo.alaska.edu
RECORDING ON THE STATUS OF ALASKA'S VOLCANOES (907) 786-7478
CONTACT INFORMATION:
Tom Murray, Scientist-in-Charge, USGS
tlmurray@usgs.gov (907) 786-7497
Steve McNutt, Coordinating Scientist, UAF/GI
steve@giseis.alaska.edu (907) 474-7131
The Alaska Volcano Observatory is a cooperative program of the U.S. Geological Survey, the University of Alaska Fairbanks Geophysical Institute, and the Alaska Division of Geological and Geophysical Surveys.