GEOLOGY

EARTH SCIENCE

EARTHQUAKES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which scale measures the magnitude, or size, of an earthquake?
A
Mercalli
B
Richter
C
weight
D
density
Explanation: 

Detailed explanation-1: -Richter scale (ML), quantitative measure of an earthquake’s magnitude (size), devised in 1935 by American seismologists Charles F. Richter and Beno Gutenberg. The earthquake’s magnitude is determined using the logarithm of the amplitude (height) of the largest seismic wave calibrated to a scale by a seismograph .

Detailed explanation-2: -The Richter Scale It used a formula based on the amplitude of the largest wave recorded on a specific type of seismometer and the distance between the earthquake and the seismometer.

Detailed explanation-3: -The idea of a logarithmic earthquake magnitude scale was first developed by Charles Richter in the 1930’s for measuring the size of earthquakes occurring in southern California using relatively high-frequency data from nearby seismograph stations.

Detailed explanation-4: -An earthquake has only one magnitude determined from measurements on seismographs. The first widely-used measurement was the Richter scale. It is now considered outdated and the Moment Magnitude Scale (Mw) is deemed more accurate-a strong earthquake would be typically described as 8.5 Mw magnitude.

Detailed explanation-5: -What is the scale of a Richter scale? The Richter scale ranges from a value of 1 to a value of 10. It is a logarithmic scale. With each increase in the magnitude of the earthquake, the amount of ground shaking increases by 10 times, and the amount of energy released increases 32-fold.

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