The difference between the two mentioned magnitudes is 4.
A magnitude 1 earth-quack is 10000 times bigger than a magnitude -3 earth-quack. On the other hand, it is 1000000 times stronger in terms of energy release.
Note: To calculate the difference in energy between two earth-quacks, first you calculate the difference between their magnitudes and then you raise 10 to the output you obtain.
These factors contribute to the development of the population.This phenomena had happened in the last 2 centuries in all of the countries to help to improve the conditions of the life.
The US received more than 20 million immigrants.
