The volcano in Washington state left 57 people dead and levelled 250 homes when a 5.1 magnitude earthquake caused it to erupt in 1980.
An avalanche of debris crashed down the mountain and reduced its height by 1314ft.
The trail of destruction brought down 47 bridges, and wiped out 15miles of railyway and 185miles of highway.
Between 2004 and 2008 it was classed as being in a state of eruption as it continuously released magma…..More Here