What would happen if 7 billion people jumped at once??

If the whole population jumped at once, nothing amazing would happen. The Earth would be completely fine. The Earth would continue to rotate on its axis at 1,000 mph and we would still continue to rotate around the Sun at 67,000 mph. If all the people on the Earth jumped at once at one central location, it would not be nearly enough force to knock the Earth off its orbit or disrupt its rotation on its axis. Our collective mass is an awful lot—just not compared to the mass of the Earth.

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However, some other interesting things might happen. For example, if everyone on the Earth decided to come to T.F. Green Airport and jump at once, there would be a loud bang at an astounding 200 decibels. For context, a jet engine produces 150 decibels of sound at takeoff, and our pain threshold is at 120 decibels

In addition, since T.F. Green is near the coast, there is a change that there could be a tsunami. There would more than likely be a large scale upper-crust earthquake. The ground would begin to shake, and it could trigger a tsunami with 100-feet-tall waves if we were close enough to the coast.

The shaking could also lead to an earthquake falling in the 4-8 magnitude range. That means it could be anywhere from a light shake to one that could cause some major destruction. It's very hard to calculate a hypothetical situation like this.

*VSauce covered this topic in more detail. Check out the video below to dive in-depth into this interesting concept.

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