Question

Which of the following is/are the measuring instruments of earthquakes?
A. Seismograph
B. Richter Scale
C. Mercalli Scale
D. All of the above

Answer 1

Hint: Earthquakes occur from a sudden release of energy in the earth’s lithosphere that creates seismic waves resulting in the shaking of the surface of the Earth. It is measured through instrumental scales which is used to describe the size of an earthquake.

Complete answer: Richter Scale, Seismograph and Mercalli Scale are all used to measure Earthquake.Seismograph is an instrument which measures the direction of movement of waves and their passage at a particular point is recorded by Seismograph.
Richter Scale measures the power of an earthquake on a scale of 1-9. It is logarithmic. The magnitude on the Richter Scale represented in whole numbers and decimal fractions whereas on Mercalli Scale is used to measure the intensity of an earthquake. It is based on observations and experiences on a scale of 12 degrees of intensity. It is a linear measurement

Looking at the options given:
Option D is the correct answer as all three of the above options are correct.

Note: The largest earthquake with a magnitude of 9.5 came in Chile on May 22, 1960.It was a megaquake that is almost 1,000 miles long lasted for approximately 10 minutes. This earthquake is also known as the Great Chilean Earthquake.