Thursday, Sep 27, 2007

AVO increased the Volcanic Alert Level to Advisory and the Aviation
Color Code to Yellow for Augustine on 22 September due to an increase
in seismic activity below the summit over the previous week. During
22-25 September, the earthquakes were generally less than M 1 and were
located at shallow depths beneath the summit. [more]

Thursday, Aug 17, 2006

AVO reduced the Concern Color Code at Augustine from Yellow to Green on 9 August. Seismic, satellite, and visual data indicated a decrease in activity to background levels. No changes were seen at the summit during the previous several months. AVO warned that the lava dome and surrounding area were still unstable despite the apparent cessation of lava-dome growth. Rockfalls and avalanches were still occurring, especially on the N flank, and may continue for several weeks or months.

[more]