Expository Essay On Earthquake

In Valdivia, Chile 1960 an earthquake changed the lives of many. An earthquake is the violent shaking of the ground that will destroy homes, buildings, landforms, historical monuments, and lives. Earthquakes begin with the breakage of rock along a fault line. When two tectonic plates rub against each other they create an earthquake. Earthquakes will ride along a fault line which will determine how long the quake will go on. The larger and longer the fault like the bigger the earthquake. Earthquakes send out waves, primary waves or, p waves and secondary waves or, s waves travel along the interior of the earth. These two waves are called body waves. While detecting the waves, the primary waves appear first then the secondary waves. Primary waves travel through solids, liquids, and gasses, which means they are about to travel through the liquid center. Secondary waves are only able to travel through solids which are why scientists have found that there is a loss of these waves once they reach the center.

The San Francisco Earthquake written by Jack London is journal of his events throughout the devastating acts of God that hit San Francisco in 1906. (461-466)

On April 18, 1906, an earthquake occurred in San Francisco with a magnitude of 7.9. The earthquake was caused by the San Andreas Fault since the San Andreas Fault slip over a segment. The earthquake could be felt from Oregon to southern California. Buildings in San Francisco was destroyed by earthquake and fires. Fires started after the earthquake occurred and firefighters were not able to stop the fire because the water mains were broken and because of this, firestorms started to develop around San Francisco. Then, the San Francisco Mayor E.E. Schmitz called the U.S. Army troops to shoot anyone that is found looting. While the army was doing that, firefighters and U.S. troops tried to fight the fire by dynamiting the city to create firewalls.

A ‘hazard’ can be defined as a geophysical process operating within the lithosphere, atmosphere, hydrosphere or biosphere which could potentially lead to the loss of human life or property. However, an earthquake only becomes hazardous and therefore needs management if it occurs within close proximity to a vulnerable population. To some extent, any human settlement around the world situated close to or on top of an area of seismic activity is vulnerable. However, not all nations suffer equal devastation.

What would you do in a situation of a natural disaster with no resources, alone with no hope? A lot of people are scared from all of this commotions, fearing of no hope, losing lives even loved ones. There was a deadly magnitude earthquake of 7.2 that struck the central philippines on a national holiday. An estimated 43,000 people experienced severe shaking. Another earth quake hit with a magnitude of 6 in the fault of 1990 caused $154 in damage.The temblor is the strongest too come in 23 years. (Background essay)

Earthquakes are caused when two blocks of earth suddenly slip past one another. The surface where the two blocks slip is called the fault. The earthquake starts below the earth’s surface at the hypocenter, and the location above the hypocenter is called the epicenter. Earthquakes can have foreshocks which is a smaller earthquake that happens before the larger quake. Earthquake can also

The 2002 Afghanistan earthquake measured 5.9 on the Richter scale and killed 1,800 people. The 2001 western Washington earthquake measured 6.8 on the Richter scale and killed only one person. Can you imagine why the huge difference in the numbers of deaths? Hint: It has to do with construction materials.

An earthquake would be classified as a sudden ferocious shaking of the ground, typically causing great obliteration because of manoeuvre within the earth’s crust or volcanic action.

What is an earthquake and why do they happen? : An earthquake is vibrating of the ground caused by the rapid breaking and motion of large parts of the earth’s rocky outermost crust. Earthquakes

Did you know in 1906 an earthquake with a 7.1 on the Richter scale hit San Francisco? Not only that the damages were huge, the fire resulted from the earthquake burned down twenty-eight thousand buildings alone! But, the earthquake made around two hundred and twenty-five thousand residents homeless which was more than half the amount of residents in San Francisco at the time. Also, if we presume that there were four people in a house then that’s fifty-six thousand two hundred and twenty-five housing that's been demolished, oh you might have noticed, but that is just a 7.1 earthquake which isn’t even the strongest earthquake to hit the world! Now here is an interesting question, what makes these earthquakes so dangerous? Or rather how does earthquake destroy things anyway because you know that earthquakes are just the shifting of the earth's crust.

Earthquakes are sudden trembling or shaking vibrations. Earthquakes are large spinning spiral winds, that comes together by rocks underground breaks along the fault. There are two types of earthquakes, there is the body waves and the surface waves. Body waves travel at 7/8 km. The body wave is the fastest of the two waves. The surface waves act as a gravity waves that are between two fluids with different density. Unlike hurricanes,

“I felt very at home in California, but the place is prone to earthquakes, and the one in 1944 scared the life out of me. For months afterwards, I felt that every time I sat down, I should have to put on a seatbelt.” Earthquakes are when tectonic plates slip past each other causing a “snap’. The ground shakes violently and can even crack. Though the occurrence of an earthquake is dreadful, familiarizing yourself with the causes and effects can be useful, and in turn make it less scary.

Earthquake Hazards occur when there are adverse effects on human activities. This can include surface faulting, ground shaking and liquefaction. In this essay I will be discussing the factors that affect earthquakes, whether human such as population density, urbanisation and earthquake mitigation or physical such as liquefaction, magnitude, landslides and proximity to the focus.

Purpose: Everyone will think that we are living in a peaceful state now and ignore to pay attention to the natural disaster information. On the contrary, this thought in your mind will reduce your sense of crisis. Believe or not, increase a sense of crisis of the earthquake and learn more earthquake information can decrease the damage when the earthquakes occur in our life

     An Earthquake is the shaking of the earth's surface caused by rapid movement of the earth's rocky outer layer. The sudden shaking of the ground that occurs when masses of rock change position below the Earth's surface is called an earthquake. The shifting masses send out shock waves that may be powerful enough to alter the surface of the Earth, thrusting up cliffs and opening great cracks in the ground.