Q. Consider the following statements regarding earthquakes:

1. The intensity of an earthquake is measured on the Mercalli scale.
2. The magnitude of an earthquake is a measure of the energy released.
3. Earthquake magnitudes are based on direct measurements of the amplitude of seismic waves.
4. In the Richter scale, each whole number demonstrates a tenfold increase in the amount of energy released.

Which of the above statements is / are correct?
Answer: II, III and IV
Notes: Magnitude measures the energy released at the source of the earthquake and is determined from seismic measurements. Intensity measures the effects of earthquake shaking at a location. The Richter scale is logarithmic, with each whole number indicating ten times more amplitude and approximately 31.6 times more energy release.

This question is part of 40000+ MCQs GKToday PCS Mock Tests Series in GKToday Android app. Question Number: 45 in GKToday PCS Mock Test - 27 in above course in App.