An earthquake is
a sudden tremor or movement of the earth’s crust
, which usually originates at or below the surface. … Apart from natural causes like the movement of the Earth’s tectonic plates and volcanic eruptions, there are other man-made causes of earthquakes.
What is an earthquake short definition?
Earthquake is a term used to describe
both sudden slip on a fault
, and the resulting ground shaking and radiated seismic energy caused by the slip, or by volcanic or magmatic activity, or other sudden stress changes in the earth.
What is earthquake explain?
An earthquake is
the result of a sudden release of stored energy in the Earth’s crust that creates seismic waves
. … At the Earth’s surface, earthquakes may manifest themselves by a shaking or displacement of the ground. Sometimes, they cause tsunamis, which may lead to loss of life and destruction of property.
What causes earthquake Class 9?
Earthquakes are caused by
the sudden release of stress along faults in the earth’s crust
. The continuous motion of the tectonic plates causes the steady build of pressure in the rock strata on both sides of the fault until stress is great enough, which is released in jerky and sudden movement.
What is earthquake Class 8?
Earthquakes: Are earthquake is a
sudden shaking or trembling of the earth
which lasts for a very short time. Earthquakes can cause immense damage to buildings, dams, etc. They may also cause floods, land slides, tsunamis and loss of life. It is caused by a disturbance deep inside the earth’s crust.
What earthquake causes?
Earthquakes are the
result of sudden movement along faults within the Earth
. The movement releases stored-up ‘elastic strain’ energy in the form of seismic waves, which propagate through the Earth and cause the ground surface to shake.
What are the 10 causes of earthquake?
- Groundwater extraction – decrease in pore pressure.
- Groundwater – increase in pore pressure.
- Heavy rain.
- Pore fluid flow.
- High CO2 pressure.
- Building dams.
- Earthquakes.
- No earthquakes (Seismic quiescence)
What is the name of earthquake?
An earthquake (also known as a
quake
, tremor or temblor) is the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth’s lithosphere that creates seismic waves.
What are the 3 main causes of earthquakes?
- Volcanic Eruptions. The main cause of the earthquake is volcanic eruptions.
- Tectonic Movements. The surface of the earth consists of some plates, comprising of the upper mantle. …
- Geological Faults. …
- Man-Made. …
- Minor Causes.
What are the types earthquake?
There are four different types of earthquakes:
tectonic, volcanic, collapse and explosion
. A tectonic earthquake is one that occurs when the earth’s crust breaks due to geological forces on rocks and adjoining plates that cause physical and chemical changes.
How we can prevent earthquake?
We cannot prevent natural earthquakes from occurring but we can significantly mitigate their effects by
identifying hazards
, building safer structures, and providing education on earthquake safety. By preparing for natural earthquakes we can also reduce the risk from human induced earthquakes.
What is Richter Scale Class 9?
What is known as Richter scale ? State its uses. Answer: Ritcher scale is
used to measure the intensity of earthquake through a scale
, which is motivated by a needle attached to this instrument The zigzag wavelength of the earthquake comes on the screen and calculated from 1 to 9 scale measured in centimetres.
What is earthquake Class 11?
An earthquake is, simply put,
shaking of the earth’s crust
. It is caused due to the energy release, which triggers waves that travel in all directions. The emanation of energy occurs along a fault. … Rocks along a fault generally move in opposing directions.
What is earthquake example?
An earthquake is
caused by a sudden slip on a fault
. … When the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through the earth’s crust and cause the shaking that we feel. In California there are two plates – the Pacific Plate and the North American Plate.
What is earthquake Class 5?
An earthquake is the
shaking of the surface of Earth
due to the sudden release of energy in the Earth’s crust, as a result, seismic waves (also known as S waves)are created.
What is Lightning Class 8?
The bright flash of light which we see in the clouds is called lightning. Lightning is
an electric discharge in the atmosphere between oppositely charged clouds
(or between charged cloud and the earth). Lightning is produced by the electric charges in the sky. … spark as a flash of lightning is the sky.
