Mount St. Helens
All About The Most Dangerous Volcano The U.S. Has Ever Had
Mount St. Helens
Mount St. Helens is a composite, stratovolcano. This is true because a stratovolcano is a tall volcano that is composed of one layer of volcanic ash and hardened lava. Stratovolcanos create explosive eruptions. Composite volcanoes form from explosive eruptions of pyroclastic material followed by quieter flows of lava. Composite volcanoes form over hundreds of thousands of years.
There are many parts of the volcano as well. At the top of the volcano, there is a gas/steam plume. This is where the gas and steam of the volcano came out. Near the gas/steam plume, there is the Lava Dome and the Sugar Bowl Dome where magma exploded out of its magma chamber. There is also the Pumice Plain, where pumice destroyed the forests and areas. The gas/steam plume is the crater, the Sugar Bowl Dome and the Lava Dome are part of the vent, and the Pumice Plain was the result of the eruption.
On March 20, 1980, several small earthquakes were detected in this area, and people became interested in this region. Between March 20th and May 18th, over 2,800 earthquakes were detected in that area. A lot of people came to see this place because it was becoming a tourist attraction place. Days leading up to the eruption, the Washington governor had to call the national guard to keep tourists from going near Mount St. Helens.
On May 18, 1980, at 8:32 in the morning, the volcano erupted. There was an earthquake there that measured 5.1 on the Richter scale, and that's what caused the volcano to rattle and erupt. There were 57 people killed, and most of them died because of breathing in hot gases. Because of the blast, the volcano's height was reduced by 1,314 feet. In the state of Washington, over 900,000 tons of ash was cleaned. There was 230 square miles that the volcano affected, which was 110,000 acres. Over 7,000 animals were killed as a result of the eruption. These are some of the reasons why the 1980 eruption of Mount St. Helens was the deadliest and most economically destructive volcanic event on U.S. soil ever.
Today, Mount St. Helens is an active volcano. An active volcano is a volcano that has erupted in the past 10,000 years, and Mount St. Helens last erupted in 2008. It is a tourist attraction in Washington. But remember-if someone tells you that there is a volcano nearby, listen to them and go far away. Go far, far away.