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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.
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उत्तर
- The seismic waves can be divided into primary, secondary, and surface waves.
- When energy is released from the Earth's interior, the primary waves are the first to reach the surface.
- Subjected to a ‘P’ wave, particles in the rock move in the direction of waves to and from and therefore, these waves are also called forward-backward waves.
- Thus, during an earthquake, the buildings at the foothills of the Himalayas moved forward and backwards as they were first subjected to “P” waves.
- These movements create tremendous tension in the earth’s crust, and when the tension goes beyond limits, the energy is released in the form of waves, which is the cause of the trembling of the earth’s surface.
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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:
Most earthquakes occur on account of the strain in the _________.
Fill in the blank:
About 70 percent of the earthquakes occur in the _________________ Belt.
What is called an earthquake?
Name some Earthquakes which caused great damage.
The magnitude of an earthquake is measured by ______.
The earthquake is measured by the ______ scale.
The earthquake is a ______ activity.
In India, the Himalayan region and the ______ valley are prone to earthquakes.
What is the point of the earth’s surface directly above the focus called?
