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Case study: Mt St. Helens.

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Introduction

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.

Middle

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.

Conclusion

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.

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