Navigate to additional results. /'e: thkweIk/. /'e: rthkweIk/ A quake is a sudden, intense shaking of the earth's surface. It was a catastrophic, enormous, and strong earthquake. The magnitude of the earthquake was 68 on the Richter scale. It was felt in a large part of Japan.
Earthquakes are caused by movements or changes of rock within the Earth's crust. These changes cause parts of the crust to break away and fall into space or to slide over each other. The released energy then becomes available for use by living organisms. Earthquakes can be classified according to their origin: subduction, convergence, volcanic, or tectonic. Subduction earthquakes occur where one plate dives beneath another (the Philippine Sea Plate dives under the Eurasian Plate). Convergence earthquakes occur where two plates collide. Volcanic earthquakes occur when an eruption causes the top layer of rock at a volcano's summit to collapse. Tectonic earthquakes occur as a result of movement along geological faults.
Subduction earthquakes involve one plate diving beneath another. This happens when one plate moves under another. The plate that is being submerged is called the deep-seated plate. The plate that is moving over the deeper plate is called the shallow-seated plate.
An earthquake is a rapid movement or trembling of the Earth's tectonic plates that causes the ground to shake. This shaking can cause damage to numerous structures, such as buildings, as well as additional deterioration of the earth's surface. Seismology is the study of earthquakes. The science of earthquake prediction involves trying to determine when and where an earthquake will happen next.
Earthquakes are caused by changes in pressure between two regions of the Earth's crust - the rigid lithosphere and the fluid core. When these pressures become unbalanced, one region tends to move toward the point of imbalance, causing an earthquake. The type of motion involved is usually vertical displacement of large blocks of rock within the lithosphere, but horizontal displacement along either continental or oceanic plates is also possible.
The location of an earthquake is provided by sensitive instruments on land or in the ocean that detect changes in gravity or magnetic field strength. The distance from its source to the observation point determines how far away an earthquake can be detected by its effects. For example, an earthquake closer than about 10 kilometers (6 miles) can be identified by its influence on the ground below it; greater distances require monitoring other phenomena for evidence of an impending collapse.
Every earthquake is unique. They can be divided into three types based on their intensity on the Richter scale: strong, moderate, and weak. Strong earthquakes occur at magnitude 6 or greater.
Earthquake. Earthquakes in the plural. The plural form of earthquake denotes the presence of more than one (kind of) earthquake. Scientists have recorded hundreds, if not thousands, of small earthquakes around the world every day. Only a few of these events are large enough to be considered true earthquakes. In fact, a majority of them are too small to even be felt by humans.
An example sentence: "The earthquake that devastated Nepal last year was a magnitude 7.3 event." Here, "event" refers to the destruction caused by the earthquake. This term can be used for other things that cause damage or loss of life; for example, "the tsunami that followed the earthquake was a devastating force against Japan's coastline."
True earthquakes occur only on earth. However, seismic activity also occurs elsewhere in space. In fact, it is normal for planets, stars, and galaxies to collapse into themselves or explode due to this activity. NASA states that between 500,000 and 1 million asteroids larger than 1 kilometer in diameter fall onto Earth each year. Many of these objects are likely to be toxic and could cause widespread damage upon impact.
The probability of a major earthquake occurring in any given area increases as the distance from its center grows.
In its broadest definition, the term "earthquake" refers to any seismic event that creates seismic waves, whether natural or created by people. Earthquakes are primarily generated by the failure of geological faults, although they can also be triggered by other events such as volcanic activity, landslides, mine explosions, and nuclear testing. Seismic waves propagate through Earth's solid material and reach us with our motion (relative to Earth). These waves cause objects on land or in water to vibrate, which is why we experience tremors when an earthquake occurs.
How do earthquakes happen? An earthquake is a violent movement on the surface of the earth caused by the sudden displacement of huge quantities of rock and soil. The source of these displacements may be as small as a house falling over inside its own building or as large as an entire continent shifting beneath its mantle. The result is the same: damage to buildings, loss of life, and economic loss. Although earthquakes can occur anywhere in the world, they are most common in areas where there is strong ground movement called tectonics. Tectonic plates collide and diverge, causing mountains to rise up where there were once beaches or ocean floors. This happens all the time around the globe, but most of the time it goes unnoticed by humans. When two plates pull away from each other, deep gaps often form between them where heat flows are restricted and large amounts of energy are stored. Eventually, this strain is released in a large explosion known as an earthquake.
An earthquake is a violent shaking of the earth's surface that frequently causes extensive damage. The policy covers damage caused by shock and fire caused by or occurring as a result of an earthquake. The majority of the destruction caused by earthquakes is a direct result of the ground forcefully shaking. This can result in buildings collapsing, causing death and injury.
When an earthquake strikes, the land underneath it shakes violently for a number of reasons: firstly, because any object that is not fixed to the ground will try to move with respect to the earth (remember, all objects within the earth interact through gravity). Secondly, because inside the earth there are many large objects moving around including water, gas bubbles, and rocks. When an earthquake occurs these objects get jostled about which creates more damage than you might expect.
For example, when a rock falls into a hole in the ground it creates pressure on whatever was at the bottom of the hole which may cause it to burst from the force of the explosion. This is called "faulting" and can happen during an earthquake or geyser eruption. If the hole was filled with water then the wave action caused by the falling rock could cause other stones to slip into the hole, thus causing even more damage! Faulting is one reason why buildings collapse during an earthquake, they become overloaded like a bridge and then break down under their own weight.
An earthquake (also known as a quake, tremor, or temblor) is the shaking of the Earth's surface caused by a rapid release of energy in the Earth's lithosphere, resulting in seismic waves. Seismic waves continue into the atmosphere where they produce lightening and thunder, cause wind damage, and generate low-frequency vibrations that are detectable at great distances.
They are usually but not always associated with volcanic activity. Volcanoes form when gas inside the Earth's crust forces its way to the surface. If enough gas is released, it becomes buoyant and floats up toward the surface. When it reaches the top, there is no more room for it above ground, so the gas pushes down on the surrounding rock causing it to break away and fall in on itself forming a volcano. As the gas escapes into the sky, it changes from being a gas to being a liquid, which is why volcanoes tend to have fairly clear skies during eruptions.
When this gas force its way to the surface through fissures in the rock, it can also cause an earthquake. Gas leaks below the surface may reach deep enough to touch other rocks further down, causing them to move too. This is how large scales earthquakes occur. Smaller scale earthquakes happen because of two objects crashing together either underground or underwater.