There is this urban legend: If all Chinese would jump off a table at the same time, the
resulting earthquake would hit the USA. Actually
it would strike Argentina. And of course this is just a legend, it wouldn't work,
as shown on TV.
But it is actually possible to induce earthquakes, or at least let all
seismic sensors around the world think so:
North Korea's recent test of a nuclear bomb was
recorded as an earthquake of magnitude 4.7. It's always nice to know a country is setting its priorities right. Who cares about starving people, if you can make so much noise...