Printer friendly versionALASKA VOLCANO OBSERVATORY
Wednesday, January 25, 2006 1:05 PM AKST (2205 UTC)
59.3633°N 153.4333°W, Summit Elevation 4134 ft (1260 m)
Current Level of Concern Color Code: ORANGE
Seismicity at Augustine Volcano increased slightly last night but has diminished this morning. Seismicity remains relatively low overall and is still above background. Satellite observations indicate that faint thermal anomalies persist at the volcano.
Yesterday, AVO staff were able to measure gas, collect thermal imagery, and make visual observations. Volcanic gas emissions were similar to those measured between January 9 and 19. Thermal images indicate that a broad area at the summit is warm but magmatic temperatures were not detected. Pyroclastic flows emplaced during eruptions on January 13, 14, and 17 are cooling slowly and remain warm. A steam and gas plume rising to 7,000 feet above sea level and drifting to the south also was observed. A light dusting of ash on the south flank of the volcano, observed yesteday, indicates minor amounts of ash in the plume. The Augustine island web camera was cleared of snow and ice and the image will be refreshed as conditions and battery power permit. Images from a time-lapse camera on the north side of the island were downloaded and are being processed.
Periods of quiescence and low-level seismicity during an eruptive phase are not unusual and have occurred during past eruptive episodes of Augustine in 1976 and 1986. The decline in seismicity since the last explosive event on January 17 does not necessarily mean that explosive eruptions have ended and they could resume with little or no warning. AVO is monitoring the situation closely and the observatory is staffed 24/7.
ABBREVIATED COLOR CODE KEY
(contact AVO for complete description):
GREEN volcano is dormant; normal seismicity and fumarolic activity occurring
YELLOW volcano is restless; eruption may occur
ORANGE volcano is in eruption or eruption may occur at any time
RED significant eruption is occurring or explosive eruption expected at any time
VOLCANO INFORMATION ON THE INTERNET: http://www.avo.alaska.edu
RECORDING ON THE STATUS OF ALASKA'S VOLCANOES (907) 786-7478
Tom Murray, Scientist-in-Charge, USGS
email@example.com (907) 786-7497
John Eichelberger, Coordinating Scientist, UAF-GI
firstname.lastname@example.org (907) 474-5530 OR (907) 590-8247
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.