What Volcano Is It
Mount Saint Helens is a stratovolcano or a
Where Is It
It is located in Washington about 50 miles east
of Portland, Oregon. It is located is southeast
EruptionsIt had a
In 1980 was its first bad eruption.
beginning magnitude of 5.1. This was its first
eruption and it made the hugest landslide
recorded in US history!
Its other bad eruption was from November
1986 to 1999 it increased very hugely seismicity
there were 30 bursts from 1989 to 1991 lasting
minutes to hours. There were also small
explosions from the dome close to it.