• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Case study: Mt St. Helens.

Extracts from this document...


Case study: Mt St. Helens Mt St. Helens, one of the 13 active volcanoes around the world (which is one of the most dangerous volcanoes around us). Mt St. Helens is located in Washington, the Pinochet National Forest Park, its spirit lake had attracted massive tourist which made a huge amount of profit for the tours company. The last eruption before the previous one was at 1857 which brought some damage but not as much as the one that took place at 1980. 20th March 1980, a big earthquake occurred. The geologist around the volcano found something was wrong, the volcano was back again. The earthquake occurred because the magma is in a great pressure, full of energy and in a high temperature which was forced to be released. At 31st March, emergency was declared, people who are living 20 square mile were forced to be evacuated, but one man, who's been seen as a hero didn't want to leave, the reason is that he's spent his life time to live there and he was not going to leave and of course he died at the end; his name is Harry Truman. ...read more.


8:32am 53sec: the Nuee Ardente ruined the nearest forest which was 20 miles away. 8:34am 5sec: the first victim was made, Harry Truman. 8:36am 30sec: the explosion ended. In a few minutes, massive damage was made. There were some strange thing about the Nuee Ardente, which was when the Nuee Ardente ran in a really fast speed; it made a very loud noise which was not heard by the people near by but the ones who are 60 miles away! Why? It is because the sound was bounced to the atmosphere and bounced back to the ground, and the people near by couldn't hear it was because the air are been sucked in, without the air, no sound shall be heard. So what made this "mad" volcano do such a thing? It is the plate. There is actually another plate between the Pacific plate and the North American plate; which is the Juan De Fuca Plate. The plate margin happening between the Pacific plate and the Juan De Fuca plate is a constructive margin which means two plates will go away from each other which also means the magma will push up and will actually make convection current. ...read more.


Also, the rocks been banged can also go really far and destroy buildings, vehicles and lots of things. In a long term, the Nuee Ardente can travel around the world! In two days after the eruption occurred, the cloud reached New York! And in two weeks, the cloud travelled around the world! This thing gives us a tremendous view when sun sets. And also, the vegetation around the volcano will need a long time to recover, even till now, not much was recovered. For a long time, geologist had spent a long time on trying to predict when will a volcano erupt, but it is almost impossible, because every volcano has its own way of "living" which is really hard to either catch or predict. Nowadays, geologists are using satellites with infra-red to take pictures and the images will be sent back to the University of Hawaii to be analyzed, And if there is anything wrong, the University will have the authorities to warn the people near by the volcano. Volcanoes are strange, we can hardly know what it is "thinking" about, maybe, while you are reading this case study, a volcano might had already erupted. Philip Huang Year 10 School House ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Hazardous Environments section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Hazardous Environments essays

  1. Title : The Determination of Microbial Numbers Objectives:Practically every phase of microbiology requires ...

    Aseptically add the agar in each tube into each of the five plates. We should make sure that the latter step undergo as soon as possible before the agar become solidifies in the room temperature.

  2. Antartica: The Last Wilderness

    Whose world is this, anyway? To save the ice is presumably a nod to climate change. Temperatures from the Antarctic continent are obviously harder to get than in countries such as the UK. Therefore the only reliable data has been from the last 20 years.

  1. Mount St. Helens - Natural disasters.

    On the 25th and 26th there was 174 shocks with magnitudes greater than 2.6. During the week aerial views showed there was small avalanches of snow, but no sign of eruption. Two eruptions widely heard on march the 27th at 12:36, Mount St.

  2. Mt St. Helens earthquake.

    We still have the footage he shot seconds before he died. The mudslide travelled at 100mph (the fastest ever recorded) carrying pieces of rock the size of houses it when straight in to sprit lake and killed harry Truman the 80 year old man that would not move.

  1. A Destructive Plate boundary - Mt St Helens

    The last time this occurred at Fernandina, in 1968, there was a huge collapse of the floor of the caldera - it fell more than 350 meters. The new eruption has not caused another collapse, so far. The average slope angle is 25 degrees, and the eruptive fissures are concentric.

  2. Costa RicaCase Study

    Hazard zoning aims to reduce vulnerability by pinpointing high-risk areas and then avoiding siting vulnerable land uses in these areas. In spite of this Parrita is sited on high-risk land, designated as uninhabitable. In spite of this, the area is still supplied with water and electricity by the state and

  1. The origin of the Earth

    The force needed to move billions of tones of rock is unimaginable. When plates move some of the energy is released as earthquakes. The Rock Cycle The upper part of the earth (mantle, crust and surface) can be envisioned as a giant recycling machine; matter that makes up rocks is

  2. Japan 2011 Earthquake Case Study

    This caused lots of ground shaking that triggered lots of secondary effects Secondary effects: Physical: An 10-meter tsunami was seen at the port in Sendai, near the epicenter.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work