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Q: With reference to an earthquake consider the following statements. 1. The point where the energy of an earthquake is released is called the hypocentre. 2. The point on the surface, nearest to the focus of the earthquake, is called epicentre. 3. Epicentre is a point directly below the focus of an earthquake. Which of the statements given above is / are correct?
  • A. 1 only
  • B. 2 only
  • C. 1 and 2 only
  • D. 2 and 3 only
Correct Answer: Option C - The location from which seismic waves originate i.e. where the energy of an earthquake emits is called 'Hypocenter' or 'Focus' whereas the point of surface where seismic waves are experienced is called 'Epicentre'. The epicenter is (vertically) just above the origin of the earthquake. The amount of radon gases in the atmosphere increases before the earthquake the intensity of seismic waves is measured with a seismograph.
C. The location from which seismic waves originate i.e. where the energy of an earthquake emits is called 'Hypocenter' or 'Focus' whereas the point of surface where seismic waves are experienced is called 'Epicentre'. The epicenter is (vertically) just above the origin of the earthquake. The amount of radon gases in the atmosphere increases before the earthquake the intensity of seismic waves is measured with a seismograph.

Explanations:

The location from which seismic waves originate i.e. where the energy of an earthquake emits is called 'Hypocenter' or 'Focus' whereas the point of surface where seismic waves are experienced is called 'Epicentre'. The epicenter is (vertically) just above the origin of the earthquake. The amount of radon gases in the atmosphere increases before the earthquake the intensity of seismic waves is measured with a seismograph.