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  • 1. Mount Saint Helens By: Austin and George
  • 2. What Volcano Is It Mount Saint Helens is a stratovolcano or a composite volcano.
  • 3. Where Is It It is located in Washington about 50 miles east of Portland, Oregon. It is located is southeast Washington.
  • 4. 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!
  • 5. Another Eruption 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.
  • 6. The End Thank you for watching! :)
  • 7. The End Thank you for watching! :)