A magnitude of an earthquake expressed as a number to show its intensity is measured by which scale?

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Multiple Choice

A magnitude of an earthquake expressed as a number to show its intensity is measured by which scale?

Explanation:
Earthquake magnitude is quantified on a logarithmic scale that measures the amplitude of seismic waves recorded by seismographs. This scale is commonly known as the Richter scale. A higher value means a larger quake: each whole-number step represents roughly ten times greater wave amplitude and about 31 times more energy released. Modern seismology often uses the moment magnitude scale (Mw), but the familiar term used in many questions is the Richter scale. The other terms—reservoir, rainwater harvesting, and quadrat—relate to water management and ecological sampling, not to measuring earthquake magnitude.

Earthquake magnitude is quantified on a logarithmic scale that measures the amplitude of seismic waves recorded by seismographs. This scale is commonly known as the Richter scale. A higher value means a larger quake: each whole-number step represents roughly ten times greater wave amplitude and about 31 times more energy released. Modern seismology often uses the moment magnitude scale (Mw), but the familiar term used in many questions is the Richter scale. The other terms—reservoir, rainwater harvesting, and quadrat—relate to water management and ecological sampling, not to measuring earthquake magnitude.

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