Mount St. Helens

The most recent eruption of Mount St. Helens occurred in 2008, but it was a relatively minor event compared to the devastating eruption in 1980. Since then, the volcano has remained mostly quiet with only minor seismic activity.

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The 1980 eruption of Mount St. Helens did not produce any lava flows. That eruption produced massive clouds of ash and pumice. Later activity formed a lava dome, but not lava flows. No eruption that has been directly observed at Mount St. Helens has produced lava flows, but some prehistoric eruptions have.

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The 1980 eruption reduced the volcano's height from 9,677 feet to 8,365 ft.Magma reached the surface of the volcano about October 11, 2004, resulting in the building of a new lava dome on the existing dome's south side. This new dome continued to grow throughout 2005 and into 2006. Several transient features were observed, such as the "whaleback," which comprised long shafts of solidified magma being extruded by the pressure of magma beneath. These features were fragile and broke down soon after they were formed. On July 2, 2005, the tip of the whaleback broke off, causing a rockfall that sent ash and dust several hundred meters into the air.vfah.efowiiiiiiiuvscv ktZAAh35555555555555555gow/h6.u7

Mount St. Helens is a semi-active volcano that erupted in 1980. Its name comes from Alleyne Fitzherbert, 1st Baron St. Helens, a British diplomat and friend of George Vancouver, the explorer who made the first recorded sighting of the mountain and named it.

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mount st helens isn't a continent but its in the continent north America

Mt St Helen's eruption of 1980 was a pyrocastic flow diverse lava, ranging from olivine basalt to andesite and dacite). The magma is believed to come from another area laterally located to the east. Magma and rock under the volcano are cool.

The elevation of Mount St. Helens is 8,365 feet. Prior to its famous 1980 eruption it was 9,677 feet.

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When first erupted from a volcanic vent, lava is a liquid at temperatures from 700 to 1,200 °C (1,292 to 2,192 °F).

Over time the temperate will decrease as it moves away from the source.

yes it's where the Jaun de Fuca plate and the North American plate meet, it is part of the pacific ring of fire.

Mount St. Helens was 9,677 feet (2,950 meters) tall before its eruption in 1980. After the eruption, the height of the mountain is now about 8,363 feet (2,549 meters).

No. It has a crater, which is not quite the same as a caldera.

On March 27,1982 steam exploded. May 18,1982, after an earthquake broke the bulge that was on the north side, it exploded. At 8:32a.m. the earthquake happened and at 8:33 a.m. it was at full blast. So within a minute the explosion happened!

Yes, it was predicted - both generally in years leading up to 1980 and more specifically in the months before the big blast. In the weeks leading up to the Volcano hazard zones were blocked off around the volcano due to an expected eruption. However the scope and exact timing of the eruption were not forseen - hence 57 people lost their lives.

it moves as fast as the wind carries it and the blast from the volcano in witch it come from. witch will add up to around 180 miles per hour (mph).

Mount St. Helen's formed about 40,000 years ago, and the pre-1980 summit cone began rising about 2,200 years ago. Prior to the 1980 eruption, Mount St. Helens was the fifth-highest peak in Washington.

Not just near. Mount St. Helens is part of the Ring of Fire.

The lava composition of Mount St. Helens is typically classified as andesitic, which means it contains a mixture of minerals such as plagioclase feldspar, pyroxene, and amphibole. Andesitic lava is known for being thicker and more viscous compared to basaltic lava, which can contribute to explosive eruptions from stratovolcanoes like Mount St. Helens.

They are all active volcanos. They all erupted in 1980's They're all part of the ring of fire

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