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
Earthquake hazards are the results and the effects caused by an earthquake that can pose a threat, cause damage or harm both living and non-living things. However, an earthquake has never been reported of killing someone as it shakes the ground violently it’s the hazards that derive from earthquakes that cause deaths, destruction and total chaos. There are thousands of earthquake hazards but the main and most common hazards can be distinguished between human factors and physical factors. Physical factors are those that can be caused by earthquakes or effected by them such as Tsunamis, flooding from leaves breaking, shaking which can lead to building damage/collapse and potentially many forms of pollution including radiation. The scale or better known as magnitude of the earthquake effects these characteristics and determines the physical destruction.
'Volcanoes and seismic events are major pieces of evidence towards proving that plate tectonics theory is valid.' Discuss the extent to which you agree with this view (40 marks) The modern theory of plate tecctonics is a fairly new idea, developed in the last 100 years. It is now generally accepted as the explanation for seismic and volcanic activity. The theory, developed by Alfred Wegenger in 1912, states that the lithosphere is made up of seven large and several other smaller plates. He believed that all of the continents were once joined together, forming a super-continent called Pangaea.
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.
Plate Tectonics Press Release Assignment Geology/101 An earthquake is the shaking of the ground cause by an abrupt shift of rock along a fracture in the Earth, called a fault. An earthquake is caused by the breaking and shifting of rock beneath the Earth’s surface. Ground shaking from earthquakes can collapse buildings and bridges; disrupt gas, electric, and phone services; and sometimes trigger landslides, avalanches, flash floods, fires, and huge, destructive ocean waves (tsunamis) (www.fema.gov/hazard/earthquake/facts). So the question that everyone wants to know is why does the planet move when the plates move? The planet moves whenever the two plates get tangled together.
This flood was induced by a typhoon that had hit the mountain ranges afterwards and led to surface run off. In this case the country was affected greatly and more than the Californian flooding disaster of 1996-7 because they has no risk management put in place for that particular disaster, meaning the water could simply run into the villages. Secondly they has been hit by a typhoon, many people’s homes had already fallen into disrepair or destroyed, and the flood just helped more to destroy. The people were already vulnerable, flooding helps pass around disease, more people were at risk, as they only had partial homes. On the other hand in California in 1996-7 they were experiencing sub-tropical storms, it had been the wettest December in a while.
Non-explosive eruptions tend to produce mostly lava flows, which do not represent a particularly serious hazard to people, however they will destroy farmland and buildings. Ash clouds are explosive eruptions that blast solid and molten rock (called tephra or pyroclastics) into the air with tremendous force. Ash clouds pose a considerable threat to aircraft, can cause buildings to collapse and can also cause death by asphyxiation. Pyroclastic flows are a potential product of volcanic activity; clouds of incandescent gas, ash and rocks with temperatures up to 800°C and speeds of over 200kph. They can cause widespread destruction, such as the 1980 eruption of Mt St Helens.
SEARS BUSINESS MODEL People involved: Before mid 20’s: mainly focused on farmers in countryside who were largely isolated from the urban markets. After Mid 20’s: focus shifted to urban population who acquired wealth and migrated from low income class to middle class; the farmers who were enabled with increased mobility due to automobiles. Motivation: Sears, Roebuck and company: an untapped segment of population with specific needs which were till then not addressed. Customers: 1) Farmers: • Convenience – wide range of quality products could be ordered and obtained from a customized catalogue at a lower price. • Cost effective- eliminated the cost of travelling to the city.
Scientists have since seen these patterns as precursory to eruptions at many other volcanoes, including the 2004-2008 eruption of Mount St. Helens. At Mount St. Helens the value of an extensive system of seismic sensors has greatly improved our ability to determine the location and depth of earthquakes, and our ability to understand the physics of magma systems underground. The lack of short-term seismic or other geophysical indications in the hours and days prior to the May 18, 1980, debris avalanche, as well as prior to many short discrete explosions both before and after May 18, underscores that fact that scientists and public officials will not always have warning sufficient to issue short-term predictions of impending eruptive activity. Today, seismic
Japan is a country that lies a hundred km from where tectonic plates are clashing at a convergent boundary, with one plate being dragged beneath the other. These tectonic plates are very thick rating, from 10km to 50km and are in motion with respect to each other. In Japan, they tend to move at rates of eight to nine centimeters yearly hence the result is a collision, with one plate forced to go beneath the other. If enough stresses build up from this sticking, then finally there will be a sudden slip which produces an earthquake. Japan is well known for being particularly amenable to subduction zone earthquakes, with huge pressures brought to bear by the sticking tectonic plate zones nearby it, and the slipping results in many earthquakes, some of them very big for instance the Tohoku earthquake.