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प्रश्न
What is known as seismic focus and epicenter with respect to an earthquake?
उत्तर
The point of origin of earthquake waves is called seismic focus and the center vertically above the seismic focus nearest to the earth’s crust is called the epicentre.
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संबंधित प्रश्न
Give reasons why an earthquake occurs.
Fill in the blank:
___________ are the first earthquake waves to be recorded on a seismograph of an earthquake.
Fill in the blank:
The last of the earthquake waves to arrive on the surface of the earth are ___________ waves.
Name one man-made cause of an earthquake.
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. |
Explain the three types of earthquake waves.
Is it possible to predict an earthquake? Give reasons to support your answer.
Name some Earthquakes which caused great damage.
What was the cause of the Koyna earthquake in India?
Name three causes of Earthquakes.
The earthquake waves are recorded by an instrument known as ______.
Choose the odd one
The earthquake is a ______ activity.
How the earthquake can be recorded?
Give a note on Tsunami 2004.
Choose the odd one.
focus, epicenter, vent, seismic waves
