GEOLOGY

EARTH SCIENCE

EARTHQUAKES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which statement describes the Mercalli scale?
A
This scale measures seismic waves based on their size.
B
This scale rates an earthquake according to how much damage it causes.
C
This scale produces a single rating for earthquakes that reach the surface.
D
This scale measures the magnitude of an earthquake based on the size of seismic waves.
Explanation: 

Detailed explanation-1: -Which statement describes the Mercalli scale?-This scale measures seismic waves based on their size.-This scale rates an earthquake according to how much damage it causes.-This scale produces a single rating for earthquakes that reach the surface.

Detailed explanation-2: -The Modified Mercalli scale measures the earthquake’s effect on people, property and ground damage. Roman numerals are used to rate the intensity and damage. An earthquake may have a different intensity rating at different locations. Damage is usually lessened with distance from the earthquake’s epicenter.

Detailed explanation-3: -The Mercalli Intensity Scale measures the intensity of an earthquake by observing its effect on people, the environment and the earth’s surface. The Richter Scale measures the energy released by an earthquake using a seismograph.

Detailed explanation-4: -Measurements on the Modified Mercalli Intensity (MMI) scale range from I to XII and are based solely on damage assessment and eyewitness accounts. Intensity measurements near the source of an earthquake are generally higher than those at a distance.

Detailed explanation-5: -Although numerousintensity scales have been developed over the last several hundred years to evaluate the effects of earthquakes, the one currently used in the United States is the Modified Mercalli (MM) Intensity Scale. It was developed in 1931 by the American seismologists Harry Wood and Frank Neumann.

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