I will be discussing factors that cause differences in hazards posed by volcanoes. I believe the most important factor is the location of a volcano and the type of volcano. The most explosive and therefore dangerous volcanoes are found on destructive plate boundaries (Over 80% of the worlds volcanoes occur at these boundaries) for example the eruption of the Nevado del Ruiz in Colombia on the 13th November in 1985 which killed over 25000 residents of Arenas and Armero. At destructive plate margins, the oceanic crust is denser than continental crust and is therefore subducts under the continental crust. Due to high temperatures in the mantle of around 3000 degrees centigrade, this oceanic crusts melts and then rises due to the convection currents in the aesthenosphere .
Then, the day after the nuclear explosion, the contaminated dust and water rain down and contaminate a large area. This rain is known as the fallout. The head wave comes from the gigantic energy that develops from the detonation. In the center of the detonation, the temperature can reach several million degrees. The head wave only takes a few seconds, but it kills everyone within a three-mile radius.
The air located around a lightning bolt is heated to around 30,000 degrees Celsius. This is 5 times hotter than the surface of the sun. 14. The chances of being struck by lightning is about one in three million. 15.
March 25, 1947 is the day 111 coal miners were killed during their routine daily duties at the Centralia Coal Mine. There was a massive explosion that changed the city of Centralia forever. The cause of the massive explosion was due to a buildup of coal dust. The explosion was one hundred percent preventable if the necessary actions were taken in to affect beforehand. The conditions of the coal mine was deadly.
At last for conservations margins, the tension build up when plate are grinding past each other get stuck. Afterwards the plate will finally jerk past each other and sending out shock waves which is vibrations which is earthquakes. They both create lots of impact. For examples for the volcano eruption in Montserrat which is a LEDC, it cause 19
Mt. St Hellens is positioned on a destructive plate boundary, this means that two different type of plate are moving towards each other, a denser ‘Oceanic Plate’ (Juan de Fuca Plate) is moving towards a lighter ‘Continental Plate’ (North American Plate). As the Oceanic Plate is heavier as it has a body of water on it, in this circumstance ‘Spirit Lake’ it is forced to subduct under the lighter Continental Plate. When this occurs the plates can stick, this causes a huge amount of friction, heat and pressure to build up. As Mt.
Even though Hurricane Hazel had devastating winds, it was not known for that, it was known for its speed. Hurricane Hazel’s speed allowed it to do damage to seven states and parts of Canada. “Hurricane hunter planes found Hazel’s winds to have accelerated to 150 mph, and the storm was moving at an incredible forward speed 30 mph (http://en.wikipedia.org/wiki/Hurricane_Hazel)”. Those speeds are very fast moving for hurricanes, especially ones of this size. This shows that this hurricane was much more different and deadly from most hurricanes.
When Eckels first sees the Time Machine, “he looks and sees a mass and tangle, a snaking and humming of wires and steel boxes. He also sees an aurora that flickered orange, silver, and blue. There was a humming sound like a bonfire burning all the years.” (pg. 288) This is a great way to describe the Time Machine. In “A Sound of Thunder” you feel the intensity almost the whole time.
Comet tails are made up of simple ionized molecules, including carbon monoxide and dioxide. By action of solar wind, molecules are blown away, forming a thin stream of hot gases continuously ejected from the solar corona. In case you do not know the meaning of a solar corona, it is the outermost atmosphere of the Sun. Amazingly, the thin streams of high gases move at a speed of approximately 400 kilometers (250 miles) per second (as cited in Yeomans 1991 p. 185). In addition, a comet frequently also displays smaller, curved tails composed of fine dust particles blown from the coma by the pressure of solar
This eruption was an explosive eruption. 8. At first, the surrounding area experienced many small earthquakes, which suggested possible magma movement. The magnitudes of the earthquakes increasingly got higher as the volcano got closer to erupting. Then, explosions of ash, rock, and ice became common everyday occurrences.