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It was triggered by an earthquake measuring 5.1 on the Richter scale, caused an eruption, reducing the elevation of the mountain's summit from 9,677 ft (2,950 m) to 8,365 ft (2,550 m) and replacing it with a 1 mile (1.6 km) wide horseshoe-shaped crater. The earthquake was caused by a sudden surge of magma from the Earth's mantle. The debris avalanche was up to 0.7 cubic miles (2.9 km3) in volume.
What else can I help you with?
How was Mount Saint Helen eruption different from other eruptions?
The eruption of Mount Saint Helens was different from other explosive eruptions in that the initial blast was to the side, rather than straight up.
How did people prepare for the eruption of mount saint helens?
People prepared for the eruption of Mount St. Helens by evacuating the area around the volcano, following evacuation orders, and stocking up on essential supplies. Scientists also monitored the volcano closely to provide up-to-date information and early warnings to residents in the surrounding areas.
What types of materials are volcanoes like Mount St. Helens made of?
Mount St Helens is made up of andesitic and rhyolitic pyroclastic materials.
What year did Thomas J Dryer accomplish the climb to mount st. Helen?
Thomas J. Dryer hiked up Mount St. Helens in 1853
What made Mt Saint Helen's to erupt?
The eruption of Mount St. Helens in 1980 was triggered by a combination of magma rising towards the surface, increasing pressure in the volcano, and a sudden release of built-up gases. This led to a flank collapse on the north side of the volcano, resulting in a massive eruption that devastated the surrounding area.
What actually happened at mount saint Helens?
The volcano built up internal pressure until it exploded.
How was Mount Saint Helen eruption different from other eruptions?
The eruption of Mount Saint Helens was different from other explosive eruptions in that the initial blast was to the side, rather than straight up.
How did people prepare for the eruption of mount saint helens?
People prepared for the eruption of Mount St. Helens by evacuating the area around the volcano, following evacuation orders, and stocking up on essential supplies. Scientists also monitored the volcano closely to provide up-to-date information and early warnings to residents in the surrounding areas.
What types of materials are volcanoes like Mount St. Helens made of?
Mount St Helens is made up of andesitic and rhyolitic pyroclastic materials.
What year did Thomas J Dryer accomplish the climb to mount st. Helen?
Thomas J. Dryer hiked up Mount St. Helens in 1853
What made Mt Saint Helen's to erupt?
The eruption of Mount St. Helens in 1980 was triggered by a combination of magma rising towards the surface, increasing pressure in the volcano, and a sudden release of built-up gases. This led to a flank collapse on the north side of the volcano, resulting in a massive eruption that devastated the surrounding area.
Which French emperor died at Mount Saint Helen?
Is it possible you have mixed up a mountain - Mt St Helens with the island in the South Atlantic known as Saint Helena where the French emperor Napoleon Bonaparte was exiled and ultimately died on the 5th of May 1821.
What type of volcanoe is mount saint helens?
A composite volcano.
What is the most accurate and up-to-date map showing the fallout pattern of Mount St. Helens ash?
The most accurate and up-to-date map showing the fallout pattern of Mount St. Helens ash can be found on the website of the United States Geological Survey (USGS).
What types of materials are volcanos like mount st. Helen's made of?
Mount St Helens is made up of andesitic and rhyolitic pyroclastic materials.
What types of materials volcanoes like mount st Helen are made of?
Mount St Helens is made up of andesitic and rhyolitic pyroclastic materials.
What types of materials are volcano like Mount St. Helen's made of?
Mount St Helens is made up of andesitic and rhyolitic pyroclastic materials.
