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| seismologist | is someone who studies earthquakes.
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| seisomographs | are machines that measure the strength or magnitude released by an earthquake
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| seismic waves | Are tremors that radiate out known as rock waves.
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| focus | the shock waves spread out from deep within the earth crust
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| Epicentre | directly above the focus where effects are worse
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| shallow earthquake | found close to the earths surface (less than 80km) most common and dangerous .
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| afterschocks | the waves that occur after the aftermath of the main shock
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| deep focus | found deeper within the earths surface ,less dangerous(300km)
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| primary waves | are the fastest waves the travel through molten material, shake from side to side .
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| secondary waves | slower than primary waves and travel through rocks .the shake up and down
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| logarithmic scale | for every point on the scale the damage caused increased ten times
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| the magnitude of the earthquake | the stronger the earthquake the more damage it caused
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| Seismic Gaps | is the length of time bln the earthquakes in an area
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| Tiltmeters | were used to measure any bulging of the earths surface
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| seismometer | a machine used to measure the magnitude of seismic waves , then displayed on a computer .
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| ldc | less developing countries
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| tsunami | a large wave created by an earthquake under the ocean
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| liquefaction | occurs when consolidated material such as sands and gravels mis with water are shaken vigorously and turned into liquid mud that cannot support strutures and cause then to fall
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| Earthquake | the shaking or vibration of the earth's crust usually on or near on a plate boundary.
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