Story last updated at 2:34 PM on Friday, October 3, 2008

Redoubt Volcano reported steaming

Alert level remains at normal<

By Michael Armstrong
Staff Writer

An overflight last week by the Alaska Volcano Observatory saw increased steaming on Redoubt Volcano. Scientists flew to the volcano about 51 miles east of Kenai following reports on Sept. 16 by a pilot of a strong hydrogen sulfide odor and on Sept. 23 by nearby residents of loud noises coming from the volcano. No increased earthquake activity has been measured, and the alert level for Redoubt remains at normal and the aviation code remains at green, according to an information statement released by AVO today.


Photo provided by AVO

Redout volcano shows signs of activity

In the overflight on Sept. 27, scientists reported new fractures and openings in the upper Drift Glacier on the north side of Redoubt. Fumaroles on the 1968 and 1990 domes also were seen to be steaming more vigorously. A distinct hydrogen sulfide odor also was smelled on the overflight, but instruments did not detect sulfur dioxide. Seismic instruments on Redoubt have not shown increased small earthquakes above normal background levels.

In the months before the 1989-1990 eruption of Redoubt, increased activity in fumaroles and sulfur odors preceded the eruption -- but there also was an increase in earthquakes. AVO said if the current low-level unrest leads to an eruption, an increase in earthquake activity should be noticed.

Redoubt last erupted in 1989-90, causing ash to fall on the Kenai Peninsula and Anchorage, and shutting down air traffic. For more information, visit the AVO Web site at, or call (907) 786-7478 for a recorded update. 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.

Michael Armstrong can be reached at