Science, Maths & Technology
How does earthquake science help us track North Korea's nuclear tests?
...technology, it is only possible to place a nuclear device a few kilometres below the ground; if an earthquake occurs at a depth of more than 10km, we can be certain it is not a nuclear explosion. Studies of the numerous nuclear tests that took place during the Cold War show that explosions generate larger P waves than S waves when compared with earthquakes. Explosions...