In the absence of full-scale nuclear tests, a nuclear weapons state typically performs sub-critical nuclear explosions in order to study aging properties of nuclear components as part of a stockpile stewardship program. However, nascent nuclear states may be interested in weaponizing their first… More

The Phase I study demonstrated that it is feasible to detect and identify small explosions amidst a background of natural and anthropogenic noise sources. The Phase II project will develop a commercial Low-Noise Smart Sensor that would be part of a Deployable Small Explosion Monitoring System for… More

Of the 2210 nuclear explosions detonated since 1945, approximately 1400 have not been captured by any significant number of digital stations. Therefore, it is important to be able to reach back in time and recover recordings of nuclear explosions detonated in the pre-digital era. To do this, large… More

We propose to conduct a feasibility study for utilizing broadband sampling of the diffusive noise field in a dynamic environment. In ambient noise studies, the ability to resolve a wavefield is proportional to its time-bandwidth (TB) product. In a dynamic environment such as in the atmosphere or… More

Accurate seismo-acoustic source location is one of the fundamental aspects of U.S. nuclear explosion monitoring and for verification of a Comprehensive Test Ban Treaty (CTBT). Critical to improved location is the compilation of ground truth data sets for which origin time and location are accurately… More

One main issue associated with nuclear explosion monitoring is the paucity of accurate Ground Truth (GT) data used for the calibration of regional seismic networks, particularly in aseismic regions. Location accuracy of U.S. monitoring and the International Monitoring System provided for by the… More