The National Nuclear Security Administration (NNSA) today successfully conducted a subsurface, non-nuclear chemical high-explosive experiment at the Nevada National Security Site (NNSS), increasing the United States’ ability to detect low-yield nuclear explosions. ... The experiment was conducted in the P Tunnel in Area 12 of the NNSS using chemical high-explosives and radiotracers. Data collected from the experiment will be used to validate scientific models and refine algorithms that are critical to U.S. nuclear explosion detection efforts. This experiment is especially focused on further enhancing the U.S. capabilities to detect a “decoupled” explosion... ... ...researchers gathered measurements using a broad suite of advanced sensors, including accelerometers, seismometers, infrasound sensors, electromagnetic sensors, chemical and radiotracer samplers, and meteorological sensors. https://www.energy.gov/nnsa/articles/nnsa-conducts-nonproliferation-experiment-strengthen-americas-nuclear-explosion