2. And finally suppose that this earthquake described above was just a foreshock

Question

2. And finally suppose that this earthquake described above was just a foreshock of Mw4.5 and that the -main quake occurred a day or a week later. When the main quake happened it was recorded at a Mw of 7.5. How much more energy was released? (Not ground shaking Mi). What if the main shock was instead a Mw 8.5, from a Mw 4.5 then how much more energy was released? (1 point each) What if you were on top of the focus, what would is the ML? Show your work/ calculations!! Mw 4.5 to a 7.5 Mi 4.5 to a 7.5 Mw 4.5 to an 8.5 Mi 4.5 to an 8.5

Explanation / Answer

When magnitude of earthquake increasing one magnitude then energy increases almost 32 fold.

Energy release when magnitude increase from 4.5 to 7.5 is 32768 times stronger.

Energy release in 4.5 to 8.5 is 1048576 times stronger.

If you were top of focus then you will be the first to to feel earthquake.you will not instantly be subjected the maximum shaking force, but you will feel a bump.

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