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Earthquakes

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DefinitionAnswer
seismologist is someone who studies earthquakes.
seisomographs are machines that measure the strength or magnitude released by an earthquake
seismic waves Are tremors that radiate out known as rock waves.
focus the shock waves spread out from deep within the earth crust
Epicentre directly above the focus where effects are worse
shallow earthquake found close to the earths surface (less than 80km) most common and dangerous .
afterschocks the waves that occur after the aftermath of the main shock
deep focus found deeper within the earths surface ,less dangerous(300km)
primary waves are the fastest waves the travel through molten material, shake from side to side .
secondary waves slower than primary waves and travel through rocks .the shake up and down
logarithmic scale for every point on the scale the damage caused increased ten times
the magnitude of the earthquake the stronger the earthquake the more damage it caused
Seismic Gaps is the length of time bln the earthquakes in an area
Tiltmeters were used to measure any bulging of the earths surface
seismometer a machine used to measure the magnitude of seismic waves , then displayed on a computer .
ldc less developing countries
tsunami a large wave created by an earthquake under the ocean
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
Earthquake the shaking or vibration of the earth's crust usually on or near on a plate boundary.
Created by: Natifah
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