Earthquakes Subsidence

An earthquake is a natural hazard which occurs when the ground shakes.
It is the violent movement of rocks.

Subsidence is a phenomena that occurs in the Earth as it is displaced. Often found around areas of high oil activity. 
  Earth's Layers
Inner core
Outer core
Mantle
Crust - large tectonic plates and not one large , smooth, continuous layer. It is the outermost and thinnest layer of the Earth and is made out of rock.
The tectonic plates move, bump, and slide around causing energy build up below the plates. The energy that breaks free results in shaking of the Earth, in other words, an Earthquake.



Effects Of Earthquakes
Damage to buildings and infrastructure
Landslides
Fires
Tsunamis
Liquidification

Seismometers are used to record the seismic waves generated by an earthquake.
Magnitude is used to measure an earthquake's size and is related to energy.

2016