GEOLOGY

EARTH SCIENCE

SEISMOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
An earthquake scored high on the Richter scale but low on the Mercalli scale. Why?
A
it probably happened in an area with no people
B
it was a fast earthquake
C
because it damaged a lot
D
impossible to tell
Explanation: 

Detailed explanation-1: -While the Mercalli scale describes the intensity of an earthquake based on its observed effects, the Richter scale describes the earthquake’s magnitude by measuring the seismic waves that cause the earthquake.

Detailed explanation-2: -Intensity scales, like the Modified Mercalli Scale and the Rossi-Forel scale, measure the amount of shaking at a particular location. An earthquake causes many different intensities of shaking in the area of the epicenter where it occurs. So the intensity of an earthquake will vary depending on where you are.

Detailed explanation-3: -The highest rating, a XII, is applied to earthquakes in which structures are destroyed, the ground is cracked and other natural disasters, such as landslides or tsunamis, are initiated.

Detailed explanation-4: -The lower numbers of the intensity scale generally deal with the manner in which the earthquake is felt by people. The higher numbers of the scale are based on observed structural damage. Structural engineers usually contribute information for assigning intensity values of VIII or above.

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