Question

the magnitude of the two earthquake A and B on the Richer scale were 7 and 4 respectively the strength of A and B is​

Answer 1

Answer:

Magnitude    Energy in joules              Notes

2.0             6.3 x 107                           Only felt nearby

3.0             2.0 x 109                           Energy from 50 litres of petrol

4.0             6.3 x 1010                           Often felt up to 10's of miles away

5.0              2.0 x 1012                           Energy from 50 000 litres of petrol

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Answer 2

Answer:

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