Alaska Volcano Observatory

On June 8, 2021, citing a slight increase in seismic activity at Mount Gareloi (Gareloi volcano) beginning on May 18, AVO raised the aviation color code to YELLOW and the Volcano Alert Level to ADVISORY. At that time, there were no other notable changes at the volcano in satellite data or web camera views. Sulfur dioxide gas was detected in satellite imagery from Gareloi over the past week and is consistent with measurements from the last several years. No activity was observed by an AVO field crew flying over the summit on May 23, 2021.