Volcanism
The volcano is currently rated by the Alaska Volcano Observatory as Aviation Alert Level UNASSIGNED Volcanic-alert Level UNASSIGNED.
The summit is truncated by a large volcanic crater containing a 0.5 miles (0.8 km) wide crater lake, which was formed after a large, explosive eruption perhaps only a few hundred years ago. The surface of the saltwater lake is less than 200 ft (60 m) above sea level. Recent pictures of the volcano show that the crater lake is still present after the 2008 eruption.
Read more about this topic: Kasatochi Island