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Q23 (CGS/2026) Geography › World Physical Geography

Consider the following statements regarding earthquake :
I. Tectonic earthquakes originate due to sliding of rocks along a fault plane.
II. Volcanic earthquake is a special class of tectonic earthquake.
III. The intensity of an earthquake is measured by the Richter scale.
Which of the statements given above are correct?

Result
Your answer: —  Â·  Correct: B

Explanation

Statement I is correct: Tectonic earthquakes are the most common type and are generated due to the sliding of rocks along a fault plane. Statement II is correct: According to standard NCERT geography, volcanic earthquakes are often recognized as a special class of tectonic earthquakes, though they are specifically confined to regions of active volcanoes. Statement III is incorrect: The Richter scale measures the magnitude (energy released) of an earthquake, typically on a scale of 0-10. The intensity (the visible damage or impact) is measured using the Modified Mercalli Scale, which ranges from 1 to 12. Therefore, only statements I and II are correct.

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SIMILAR QUESTIONS

IAS · 2001 · Q59 Relevance score: 3.61

Consider the following statements regarding the earthquakes : I. The intensity of earthquake is measured on Mercalli scale. II. The magnitude of an earthquake is a measure of energy released. III. Earthquake magnitudes are based on direct measurements of the amplitude of seismic waves. IV. In the Richter scale, each whole number demonstrates a hundredfold increase in the amount of energy released. Which of these statements are correct ?

CDS-II · 2016 · Q14 Relevance score: 3.08

With reference to earthquakes, which of the following statements are correct? 1. Earthquakes largely occur along the converging plate boundaries. 2. Point of origin of earthquake in lithosphere is known as focus/ hypocentre. 3. Intensity of earthquake decreases with distance from the epicentre. 4. Epicentre of earthquake always remains over continents only. Select the correct answer using the code given below.

NDA-I · 2024 · Q109 Relevance score: 2.79

Which of the following statements regarding earthquakes is/are correct ? 1. The point on the Earth's surface directly above the focus is called the epicentre of the earthquake. 2. Earthquakes generate Primary and Secondary waves that radiate outward from the earthquake focus. 3. Deep-focus earthquakes are likely to cause more damage than shallow-focus earthquakes. Select the answer using the code given below :

CDS-I · 2014 · Q93 Relevance score: 2.40

Which of the following statements relating to earthquakes is/are correct? 1. The point of origin of an earthquake is called the epicenter. 2. The lines joining the places which were affected by earthquake at the same point of time are called homoseismal lines. Select the correct answer using the code given below.