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Mount St. Helens

Mount St. Helens is an active volcano in Washington State's Cascade mountain range. Mount St. Helens erupted on May 18, 1980, causing the most deadly volcanic event in United States history.

397 Questions

What tool was used to measure the eruption of mount st helens?

Scientists used various tools to measure the eruption of Mount St. Helens in 1980, including seismometers to monitor earthquakes, tiltmeters to detect ground deformation, and gas analyzers to study volcanic gases. They also used radar to track changes in the shape of the volcano during the eruption.

Is volcanoe mount st Helens still active today?

Yes. Mount St. Helens erupted spectacularly on May 18, 1980. Since then it continues to emit ash, lava and steam. As recently as 2008 it emitted an ash cloud. There are also periodic small earthquakes associated with the volcano's activity.

Why is Mount St Helens where it is?

Mount St. Helens made the news when it became active on March 20th, 1980, and then erupted on May 18th, 1980. Use the link below to the Wikipedia post on this event. It comes complete with pictures, drawings and an easy-to-read description of the action. And it is free.

What were the consequences of the eruptoin of mount st helens in 1980?

St. Helens released an amount of energy equivalent to 27,000 Hiroshima-sized nuclear weapons and ejected more than 1 cubic mile (4 km³) of material. A quarter of that volume was fresh lava in the form of ash, pumice, and volcanic bombs while the rest was fragmented, older rock.

The ash fall created some temporary but major problems with transportation, sewage disposal, and water treatment systems. Visibility was greatly decreased during the ash fall, closing many highways and roads.

Over a thousand commercial flights were cancelled following airport closures. Fine-grained, gritty ash caused substantial problems for internal-combustion engines and other mechanical and electrical equipment. The ash contaminated oil systems and clogged air filters, and scratched moving surfaces. Fine ash caused short circuits in electrical transformers, which in turn caused power blackouts.

There were also indirect and intangible costs of the eruption. Unemployment in the immediate region of Mount St. Helens rose tenfold in the weeks immediately following the eruption

this meant that the tourism and the alot of shops and supermarkets were down and were either out a job and had to move somewhere else to find a job and some large buisness's had to start there companies from scratch.

Short term effects of Mount St Helen eruption?

the world exploded and broke in 2 so the power rangers had to fix it or everyone will explode because of the sudden movement and my penis fell off and then i farted so loud they the power rangers had to give butt..ox (se war i did there)

Mount st Helen's hazard ranking?

Mount St. Helens is ranked as a very high hazard volcano by the United States Geological Survey (USGS) due to its history of eruptions and potential risk to nearby populations and infrastructure. The volcano remains actively monitored for signs of impending eruptions to ensure early warning and response capabilities are in place. It is considered one of the most dangerous volcanoes in the Cascade Range.

How many people did the mount st Helens kill?

In May of 2000, a memorial plaque was placed in a grove of trees at the Hoffstadt Bluffs Visitor's Center in memory of the victims of the Mt. St. Helens eruption. Fifty-seven names are etched into the plaque.
57 people were killed directly by the eruption. There was also a plane crash, a traffic accident, and shoveling ash which killed a total of 7 more. So don't go live near mt. saint Helens. I am not saying don't go vist it I am saying don't live next to it or near it.
57 People died in the eruption.
There was a relatively low death toll due to the eruption of Mount St. Helens because most of the people were evacuated. In total, fifty-seven people died in the eruption. The people that did die were either those who refused to leave or those who were monitoring the volcano. RIP.

Which areas were affected in the 1980 eruptio of mt st helens?

The 1980 eruption of Mount St. Helens affected a large area around the volcano in Washington state. The blast zone impacted approximately 230 square miles, destroying forests, lakes, and wildlife. The eruption also caused avalanches, mudflows, and lahars that affected the surrounding landscape.

That time did mount st helens eruption?

Mount St. Helens erupted on May 18, 1980 at 8:32 a.m. local time. The eruption unleashed a massive lateral blast that devastated the surrounding area, causing widespread destruction and loss of life. It was one of the most significant volcanic events in U.S. history.

How many lakes were damaged in the mount st helens eruption?

There were thousands of lakes damaged in the Mount St. Helens eruption in 1980. The blast of hot gas and rock destroyed vegetation around the lakes, causing debris and ash to enter the water, altering their ecosystems and water quality.

What did the government do in response to the 1980 mount st helens eruption?

Once it became clear that the unrest leading to the eruption of Mt. St. Helens was indicating a potential large explosive eruption, the police forces were activated to evacuate people living around the volcano. In addition to the evacuation of people within a specific area around the volcano, the police forces maintained the evacuation perimeter as well as when times permitted allowing the residents under escort to retrieve belongings from their homes.

Why does mount st helen exist?

Mount St. Helens is currently the only active volcano in the continental U.S. and the only one to erupt in the continental U.S. in nearly 100 years. It is also the most lethal volcano in the U.S. having cost 57 lives in the 1980 eruption. Information sourced from www.MountStHelens.com

Who was monitoring Mount St Helen's before it erupted?

The United States Geological Survey (USGS) was monitoring Mount St. Helens before it erupted in 1980. They were responsible for monitoring volcanic activity in the region and issuing warnings to alert the public of potential dangers.

How many people died when st Helens erupted?

In 1980 when Mt. Saint Helens erupted it killed fifty seven people (Wikipedia).

Resource

Wikipedia. (2008). http://en.wikipedia.org/wiki/Mount_St._Helens

Encarta. http://encarta.msn.com/media_461517894/Eruption_of_Mount_Saint_Helens.html

How did Mount St. Helens affect the global environment?

Local residents:

People were evacuated from the blast near to the volcano in the build up to the eruption totalling two months

Their homes were destroyed

57 people were killed although most were tourists

Money earned by tourism decreased as although more people came, they spent less

Local Environment:

Spirit Lake was completely filled in

The whole local environment was destroyed and took years before things grew again in the local vicinity this would therefore affect logging companies

Living animals caught in the blast were killed and the habitat was unlivable for a long time

The volcano itself has changed shape

Poisonous gas and ash was released from the volcano

Global environment:

Ash poured down on 15 states and within days, gas from the volcano, encircled the world

It created a tourist attraction

It helped advance the scientist's knowledge on volcanoes and monitoring eruptions

How many states were affected by the volcanic ash fallout from Mount St. Helens?

Parts of 9 to 12 US states were affected by ash, and a large area of SW Canada. The ash and dust plume was released to the north and east, most affecting eastern Washington state and northern Idaho state. However, smaller amounts of ash settled in parts of Oregon, Montana, Wyoming, Colorado, North and South Dakota, and Nebraska. Some reached as far as Minnesota, New Mexico and Oklahoma.

How many people were bured in mount st Helens?

57 people were confirmed to have died as a result of the eruption of Mount St. Helens on May 18, 1980.

Which town did mount st helens destroy on 1980?

The town that Mount St. Helens destroyed in 1980 was the town of Toutle in Washington State, United States.

What sort of plate margin was Mount St Helens?

Mount St. Helens is located at a convergent plate boundary where the Juan de Fuca Plate is being subducted beneath the North American Plate. This subduction creates a volcanic arc in the Cascade Range.

Why does mount st Helens help us?

Mount St. Helens is a living laboratory of volcanic study and the most studied volcano in the world. The USGS has been studying the volcano for over 30 years and lessons they have learned have saved many lives across the globe with their volcanic prediction science. For more Mount St. Helens trivia, information or travel planner see the Mount St. Helens Information Resource site at www.MountStHelens.com

What type of volcanoes are mount Shasta Mount Fuji and mount St Helen's?

Mount Shasta and Mount St. Helens are stratovolcanoes, known for their steep-sided cones and explosive eruptions. Mount Fuji is also a stratovolcano but is currently inactive, though it is closely monitored due to its proximity to populated areas in Japan.

How was Mount St Helens formed?




Mount St. Helens was formed by volcanic eruptions and flows over a long period of time.

The Cascade Mountains were formed by the collision of the Juan de Fuca Plate with the North American plate. Lava was forced upward to create volcanoes such as Mount Adams and Mount St. Helens.

The modern summit domes were the Kalama dome, formed between 1490 and 1647, and the Goat Rocks dome, formed between 1800 and 1857. These raised the mountain to its highest modern height. In 1980, the Goat Rocks dome was obliterated by the avalanche and eruption.

A new dome, as well as a surrounding glacier, have formed within the horseshoe-shaped crater. But to reach its pre-1980 size will require many more lava flows over a period of hundreds of years.




Is mount St Helens a cinder cone?

No, Mount St. Helens is not a cinder cone but a stratovolcano. Stratovolcanoes have a steep profile and are built up by layers of lava, ash, and other volcanic materials. Cinder cones are smaller, simpler volcanoes formed by the accumulation of ejected cinders and volcanic ash around a single vent.