Advertisements
Advertisements
प्रश्न
Name two man-made causes of an earthquake.
Advertisements
उत्तर
- Construction of huge dams: The weight of large reservoirs can trigger earthquakes in seismically active zones.
- Mining and blasting of rocks: Explosions and excavation near fault lines can induce earthquakes.
APPEARS IN
संबंधित प्रश्न
Arrange the following statements in chronological order in which an earthquake occurs.
- The earth’s surface vibrates.
- The plates suddenly move.
- Due to the movements in the mantle, compression goes on increasing.
- Along the weak points ( faultlines) rocks break apart.
- Stored energy is released in the form of seismic waves.
Give reasons why an earthquake occurs.
Fill in the blank:
Most earthquakes occur on account of the strain in the _________.
Fill in the blank:
___________ are the first earthquake waves to be recorded on a seismograph of an earthquake.
Fill in the blank:
About 70 percent of the earthquakes occur in the _________________ Belt.
What is known as the Richter scale?
Match the Columns.
| Column A | Column B |
| 1. Tsunami | (a) The waves that make the inhabitants feel the ground motion. |
| 2. Seismograph | (b) The instrument for measuring the intensity of earthquakes. |
| 3. S-waves | (c) Harbour waves generated by oceanic earthquakes. |
| 4. Richter scale | (d) The point on the earth surface directly above the seismic focus. |
| 5. Epicentre | (e) An instrument for recording the movement of earthquake waves. |
How is the intensity of an earthquake measured?
Name the important Earthquake-belts of the world.
OR
Indicate two major belts of Earthquakes.
Why are earthquakes related to volcanoes?
The earthquake waves are recorded by an instrument known as ______.
Seismology is the study of ______.
Choose the odd one
Define Earthquake.
Give a note on Tsunami 2004.
In India, the Himalayan region and the ______ valley are prone to earthquakes.
Name the point where the vibrations originate in an earthquake.
