Mount Saint HelensMount Saint HelensBy: Austin and George By: Austin and George

What Volcano Is ItWhat Volcano Is It

Mount Saint Helens is a stratovolcano or a Mount Saint Helens is a stratovolcano or a composite volcano.composite volcano.

Where Is ItWhere Is ItIt is located in Washington about 50 miles east It is located in Washington about 50 miles east of Portland, Oregon. It is located is southeast of Portland, Oregon. It is located is southeast Washington.Washington.

EruptionsEruptionsIn 1980 was its first bad eruption. It had a In 1980 was its first bad eruption. It had a beginning magnitude of 5.1. This was its first beginning magnitude of 5.1. This was its first eruption and it made the hugest landslide eruption and it made the hugest landslide recorded in US history! recorded in US history!

Another EruptionAnother Eruption

Its other bad eruption was from November Its other bad eruption was from November 1986 to 1999 it increased very hugely 1986 to 1999 it increased very hugely seismicity there were 30 bursts from 1989 to seismicity there were 30 bursts from 1989 to 1991 lasting minutes to hours. There were also 1991 lasting minutes to hours. There were also small explosions from the dome close to it.small explosions from the dome close to it.

The EndThe End

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