Earthquakes.
Earthquakes.
An earthquake is defined as a violent tremor in the earth's crust which sends out a series of vibrating waves in all directions.
Causes of earthquakes
Earthquakes occurs as a result of disturbances or movement within and below the earth's crust especially where there are faults or fractures. For some reasons, stresses are built up within the earth's crust. When a certain point of tension or intensity is reached or attained, cracks or sleeps occur within the earth's crust. This produces the shock effect that sends out the vibration.
The transmission of the resultant vibrations outward to the surface leads to a series of shockwaves. It is this shockwaves that gives rise to an earthquake.
The intensity of an earthquake depends on the following factors:
- the amount of shift I,e crustal displacement or movement along a fault
- the size of the rock mass involved in the movement or displacement.
Measurement of earthquake
A scale for measuring the power of earthquake was first devised in 1935 by C.F Richter. The scale is called THE RICHTER SCALE. The scale is graded from 0-9. Earthquakes measuring 0-4 are minor, from 4-7 are moderate and over 7 are severe.
Effects of earthquakes
- earthquakes cause the death if people and animal in places that they occur
- they also displace part of the earth's crust either vertically or laterally
- they also cause the destruction of buildings, roads, bridges, railways and telecommunications.
- they can also rise or lower parts of the ocean floor
- they can also rise or lower coastal rocks.
Stay tuned for more...
An earthquake is defined as a violent tremor in the earth's crust which sends out a series of vibrating waves in all directions.
Causes of earthquakes
Earthquakes occurs as a result of disturbances or movement within and below the earth's crust especially where there are faults or fractures. For some reasons, stresses are built up within the earth's crust. When a certain point of tension or intensity is reached or attained, cracks or sleeps occur within the earth's crust. This produces the shock effect that sends out the vibration.
The transmission of the resultant vibrations outward to the surface leads to a series of shockwaves. It is this shockwaves that gives rise to an earthquake.
The intensity of an earthquake depends on the following factors:
- the amount of shift I,e crustal displacement or movement along a fault
- the size of the rock mass involved in the movement or displacement.
Measurement of earthquake
A scale for measuring the power of earthquake was first devised in 1935 by C.F Richter. The scale is called THE RICHTER SCALE. The scale is graded from 0-9. Earthquakes measuring 0-4 are minor, from 4-7 are moderate and over 7 are severe.
Effects of earthquakes
- earthquakes cause the death if people and animal in places that they occur
- they also displace part of the earth's crust either vertically or laterally
- they also cause the destruction of buildings, roads, bridges, railways and telecommunications.
- they can also rise or lower parts of the ocean floor
- they can also rise or lower coastal rocks.
Stay tuned for more...
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