How earthquake scientists eavesdrop on North Korea’s nuclear blasts
Waves and ripples in the Earth can reveal the location and depth of an explosion
NUCLEAR SHAKEDOWN Rumblings of seismic waves reveal clues about North Korea’s nuclear weapons tests, detonated in a mountain.
Nicolle Rager Fuller
On September 9 of last year, in the middle of the morning, seismometers began lighting up around East Asia.