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प्रश्न
How an earthquake is caused?
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उत्तर
Causes The chief known causes of earthquakes are believed to be as follows :
- When a dormant volcano erupts into activity or an active volcano discharges matter with greater violence the surrounding areas feel tremors or earthquakes.
- When the interior of the earth cools and contracts the outer crust in some places cracks and faults are caused. This movement causes an earthquake.
- Some time water percolates so deep down into the earth that it turns into steam on account of the internal heat. This steam expands and tries to force its way out. This pressure causes an earthquake.
संबंधित प्रश्न
For the formation of a rift valley, which of the following processes should occur in the earth’s crust?
Fill in the blank:
The last of the earthquake waves to arrive on the surface of the earth are ___________ waves.
What are known as seismic focus and epicenter with respect to an earthquake?
How are earthquakes useful?
Describe how earthquakes are caused on the surface of the earth.
Name the causes of earthquakes.
Name three causes of Earthquakes.
Answer the following:
A volcanic eruption is one of the main causes of earthquakes.
Give reasons for the following:
Folding and faulting frequently go together.
The magnitude of an earthquake is measured by ______.
The earthquake waves are recorded by an instrument known as ______.
Seismology is the study of ______.
Choose the odd one
Choose the odd one
The earthquake is measured by the ______ scale.
How the earthquake can be recorded?
An earthquake of magnitude ______ scale can cause damage from things falling.
Name the point where the vibrations originate in an earthquake.
Choose the odd one.
focus, epicenter, vent, seismic waves
