While Glacier Peak, at 10,541 feet, has relatively few seismic monitoring stations, volcanic experts believe they have enough seismometers that watch for clusters of earthquake activity to know when an eruption could be imminent.
Glacier Peak, along with the other volcanoes in Washington, is a composite type volcano. The above graphic shows what areas would be affected if the volcano blew.
More Multimedia Headlines
Our new comment system is not supported in IE 7. Please upgrade your browser here.