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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:
___________ are the first earthquake waves to be recorded on a seismograph of an earthquake.
How are earthquakes useful?
How an earthquake is caused?
Earthquakes occur in the Mid-Atlantic belt.
Why are earthquakes related to volcanoes?
Give reasons for the following:
Internal processes are different from external processes.
The earthquake waves are recorded by an instrument known as ______.
Choose the odd one
What is the point of the earth’s surface directly above the focus called?
