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Q114 (NDA-I/2026) Geography › World Physical Geography

Consider the following statements regarding hypocentre :
I. It is the point where the energy is released and is called the focus of an earthquake.
II. It is the point where the earthquake starts and may be many kilometers deep within the Earth.
Which of the statements given above is/are correct?

Result
Your answer: —  Â·  Correct: C

Explanation

Both statements are correct. The hypocentre, also known as the focus, is the specific point within the Earth's crust or mantle where a seismic rupture initiates, leading to the release of energy in the form of seismic waves. Statement I is correct as "focus" and "hypocentre" are synonymous terms in seismology.

Statement II is also correct because the hypocentre marks the physical starting point of the earthquake. The depth of the hypocentre (focal depth) varies significantly; shallow-focus earthquakes occur at depths less than 70 km, while deep-focus earthquakes can occur at depths of up to 700 km below the Earth's surface. In contrast, the epicentre is the point on the Earth's surface directly vertical to the hypocentre.

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SIMILAR QUESTIONS

IAS · 2001 · Q59 Relevance score: 2.83

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: 2.11

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: 1.83

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 :

NDA-I · 2023 · Q58 Relevance score: 1.63

Which of the following statements is/are correct ? 1. Hypocenter is the point on the surface of the Earth, nearest to the focus. 2. Velocity of earthquake waves is higher in denser materials. 3. P waves move faster and are the first to arrive at the surface of the Earth. Select the correct answer using the code given below :

CDS-II · 2022 · Q89 Relevance score: -0.14

Which one of the following is the other term used for 'Focus' in relation with an earthake?