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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
Give a geographical reason.
Buildings collapsed at the foothills of the Himalayas because of an earthquake. Before collapsing, they were moving forward and backward.
Identify and name the internal movement.
Molten magma is thrown out of the earth’s mantle.
Give reasons why an earthquake occurs.
Fill in the blank:
The giant sea waves caused by earthquakes in the oceans are called ___________.
Fill in the blank:
About 70 percent of the earthquakes occur in the _________________ Belt.
What is called an earthquake?
How are earthquakes useful?
What is the difference between seismic focus and epicenter?
How is the intensity of an earthquake measured?
What is an Earthquake?
Name some Earthquakes which caused great damage.
Name three causes of Earthquakes.
Give one word for the following :
The surface position immediately above the origin of an earthquake.
Give reasons for the following:
Internal processes are different from external processes.
The magnitude of an earthquake is measured by ______.
The earthquake is a ______ activity.
Give a note on Tsunami 2004.
What is the point of the earth’s surface directly above the focus called?
Choose the odd one.
focus, epicenter, vent, seismic waves
