Dukono Volcano Volcanic Ash Advisory: CONTINUOUS VA EMISSIONS TO FL080 EXT W/SW LAST OBS 15/0120Z
Semisopochnoi volcano (Alaska): increased seismic activity
The Alaskan Volcano Observatory (AVO) raised the Aviation Colour Code and Alert Level for Semisopochnoi to ORANGE/WATCH due to a significant increase in seismic activity as well as small explosions and tremor bursts, lasting from three to twelve minutes every few hours. No ash plumes have been observed.