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Q114 (CISF/2023) Geography › World Physical Geography

The magnitude of an earthquake is measured by :

Explanation

The magnitude of an earthquake represents the total energy released at its source and is measured using the Richter scale. Developed by Charles F. Richter in 1935, it is a logarithmic scale; each whole number increase on the scale represents a ten-fold increase in the measured amplitude of seismic waves and approximately 32 times more energy release.

  • Seismograph and Seismometer: These are the actual instruments used to detect and record the motion of the ground during an earthquake. While they provide the data, the Richter scale is the mathematical tool used to express the magnitude.
  • Mercalli Scale: This scale measures the intensity of an earthquake based on its visible effects and damage caused to structures and people.
  • Tiltmeter: This is an instrument designed to measure very small changes in the ground's slope or tilt, often used in volcano monitoring.
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SIMILAR QUESTIONS

IAS · 2001 · Q59 Relevance score: 4.31

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 · 2025 · Q91 Relevance score: 1.77

Which of the following statements with reference to Richter scale is/are correct ? 1. It is the intensity scale of an earthquake. 2. Richter indicates the amount of energy released during the earthquake. Select the answer using the code given below :

CGS · 2026 · Q23 Relevance score: 1.02

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?

CDS-I · 2010 · Q40 Relevance score: -0.30

An earthquake epicentre is the

IAS · 2006 · Q22 Relevance score: -0.92

Consider the following statements: I. The Richter Scale is a logarithmic scale and so an increase of one magnitude unit represents a factor of 10 times in amplitude. II. Each integer reading of the Richter scale has an energy 100 times that of the previous integer reading. Which of the statements given above is/are correct?