what is earthquake and its causes and effect pdf Tuesday, May 25, 2021 3:41:26 PM

What Is Earthquake And Its Causes And Effect Pdf

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What are earthquakes and what causes them? How many earthquakes occur annually worldwide? What equipment is used to record and measure earthquakes? Where do earthquakes occur most frequently? Is it possible to predict earthquakes? Why are the values published on the magnitude of an earthquake sometimes slightly different?

Earthquakes are usually caused when rock underground suddenly breaks along a fault. This sudden release of energy causes the seismic waves that make the ground shake. When two blocks of rock or two plates are rubbing against each other, they stick a little. They don't just slide smoothly; the rocks catch on each other. The rocks are still pushing against each other, but not moving.

Earthquake: Causes, Effects and Magnitude measurement

Aside from being horrified by the experience, the after-effects of an earthquake are something that is very alarming just like the occurrence of tsunamis. You hear appalling stories about how one place can be brought to devastation in a snap because of earthquakes. It can happen anytime and hit places lying within the fault lines. Earthquakes are among the many natural calamities that have caused devastation to properties and claimed thousands of lives over the years. In fact, according to statistics, 50 to 80 earthquakes occur every single day and about each year. Apart from devastating properties and buildings, earthquakes can trigger a tsunami that can uproot populations or lead to loss of lives.

What causes the Earth's climate to change?

An earthquake is a sudden, rapid shaking of the ground caused by the breaking and shifting of rock beneath the Earth's surface. This shaking can cause damage to buildings and bridges; disrupt gas, electric, and phone service; and sometimes trigger landslides, avalanches, flash floods, fires, and huge, destructive ocean waves tsunamis. Buildings with foundations resting on unconsolidated landfill, old waterways, or other unstable soil are most at risk. Buildings or trailers and manufactured homes not tied to a reinforced foundation anchored to the ground are also at risk since they can be shaken off their mountings during an earthquake. All 50 states, five U.

It is also known as tremblor, tremor or quake. Let us tell you that just below the earth's surface where earthquakes start is called hypocenter and just directly above the surface of the earth is called epicentre? Size of an earthquake may differ and sometimes it is said that weak earthquakes are not felt also but the violent one may cause destruction and may destroy whole cities. It all depends upon the frequency, type and size of the earthquake experienced over a period of time.

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SUMMARY The chapter presents planners with 1 a description of the most hazardous geologic phenomena-earthquakes, volcanoes, and tsunamis-and their effects; 2 a discussion of how to use existing information to assess the hazards associated with these phenomena and incorporate mitigation measures early In an Integrated development study; 3 sources of geologic data and maps; and 4 information with which to make key decisions early in the planning process. The processes that have formed the earth continually act on or beneath its surface. The movement of plates in the earth's crust and local concentrations of heat are a continuing source of hazards to people and their structures.

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An earthquake is the sudden movement or trembling of the Earth's tectonic plates , resulting in shaking of the ground. This shaking can result in the damage of various structures such as buildings and further breakdown of the Earth's surface. The study of earthquakes is called seismology. The sudden release of tension in the tectonic plates sends waves of energy that travel through the Earth. Seismology studies the cause, frequency, type and size of earthquakes. Earthquakes are measured using observations from seismographs. The magnitude of an earthquake and the intensity of shaking is usually reported on the Richter scale.


An earthquake is a sudden shaking or vibration In the Earth caused by sudden release of energy from the Earth's surface. Most earthquakes result from movement between the large ridged blocks of rock, or plates.. that compose the Earth's surface. This movement occurs on faults, the boundaries between blocks of rock.


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So many things are said to cause earthquakes, things have become a little complex during the last years. I prepared a list with no claim to completeness of things that might cause earthquakes. Some are already well-known, some were suprising to me. I guess this can only be interpretetd as an attempt to minimize seismic hazard in Germany, everything else would be ridiculous…. He likes Central Asia and the Mediterranean and looks for ancient earthquakes. I love your post.

See the table of major earthquakes. Over the centuries, earthquakes have been responsible for millions of deaths and an incalculable amount of damage to property.

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8 or greater. Great earthquake. Can cause serious damage in areas several hundred kilometers across. TNT Equivalent. Richter TNT for Seismic. Example.

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