Nevada National Security SiteThe US blasted a tunnel to mimic a hidden nuclear test.
US authorities accused China this year of hiding nuclear tests by decoupling, despite its moratorium.
A blast fired inside a large underground chamber, not in contact with rock, sends substantially less shock to seismic sensors.
The National Nuclear Security Administration says the data will validate models and refine algorithms for detecting such explosions.
How each outlet framed it
drawn from 100+ reports worldwide
- The War Zone
- explains technical purpose: improving detection of decoupled nuclear tests; references China accusations for concealing tests despite moratorium
Sources: The War Zone