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How to Measure an Earthquake

What is seism...

Question

What is seismic focus or hypocentre?

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Solution

The place of origin within the Earth of an earthquake; usually some more or less restricted area of a fault surface. If the focus is to be some particular point, it is the central point of the area over which fault movement occurred and caused the earthquake.The hypocenter is the point within the earth where an earthquake rupture starts.

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Q.  Consider the following statements:
1. Focus in the point of release of seismic energy in the interior of the earth during earthquakes.
2. Epicentre of an earthquake is also known as ‘Hypocentre’.
Which of the following is/are ‘True’?

Q. What is seismic waves

Q. The point on the surface of earth vertically above the place of origin (hypocentre) of an earthquake is called a/an _______________.

Q. Which of the following statements are wrong?
i) Hypocenter is the point where the seismic energy is released
ii) Epicenter is the point on the surface nearest to the focus of an earthquake.

The place inside the earth's crust where the erthquake is generated is called:

(a) seismic zone of the earth (b) epicentre of the earthquake

(c) fault zone of the earth (d) focus of the earthquake

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