June 2015

1:

Two earthquakes A and B happen to be of magnitude 5 and 6 respectively on Richter Scale. The ratio of the energies released EB/EA will be approximately:

A.

~64

B.

~8

C.

~16

D.

~32

 

Answer : D

Explanation :

Rockz said: (10:29am on Tuesday 1st December 2015)
How is the ans 32?calculations please
Priya Waghmare said: (1:13pm on Monday 7th November 2016)
The Richter scale is a base-10 logarithmic scale, meaning that each order of magnitude is 10 times more intensive than the last one. In other words, a two is 10 times more intense than a one and a three is 100 times greater. In the case of the Richter scale, the increase is in wave amplitude. That is, the wave amplitude in a level 6 earthquake is 10 times greater than in a level 5 earthquake, and the amplitude increases 100 times between a level 7 earthquake and a level 9 earthquake. The amount of energy released increases 31.7 times between whole number values.

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Option: A

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