Updated: 12/23 at 5 p.m.
For the third time in as many days, Bogoslof volcano has erupted. The Alaska Volcano Observatory (AVO) has issued its highest alert level for air travel.
Bogoslof volcano is on a uninhabited island 60 miles northwest of Unalaska.
Michelle Coombs -- a scientist with the AVO -- says they were cued into today's eruption by lightning.