Conveners
O3.3 On-Site Inspection Relevant Techniques
- Dharani Wijesundara (Geological Survey and Mines Bureau, Sri Lanka)
- Aled Rowlands (CTBTO Preparatory Commission)
Magnetic field mapping, as one of the continued period technologies, plays a vital role for on-site inspection. Looking back into the recent science and technology development history, magnetic sensing has been under decades of development. This work would propose a high performance magnetic sensor based on the giant magnetoimpedance effect of special magnetic materials (i.e., the impedance of...
The resonance seismometry is one of the CTBT’s permitted techniques during an on-site inspection (OSI). In order to enhance the capabilities of the OSIs, we have developed a method for detecting a deep underground cavity based on the analysis of seismic ambient noise data called the Finite-Interval Spectral Power (FISP). The FISP method has become part of the draft of Concept of Operations for...
Vegetation stress and its impact on plant biology is postulated as an indicator of ground motion during an underground nuclear explosion (UNE); however, its scale, longevity and detectability remain unquantified. To expand the body of work on this topic, a laboratory experiment was performed to investigate the spectral response of leaves from three evergreen plant species from different...
Passive Seismic Monitoring (PSM) is the only geophysical technique allowed by the CTBT during the initial period of an On-Site Inspection. The goal is to reveal even the smallest expectable aftershocks of an underground nuclear explosion to the inspection team to locate the test site to the precision of a few hundreds of meters. With the full PSM network of some 50 small arrays deployed, M$_l$...
Visual observation (VOB) is a central tenet for identifying changes that could be related to nuclear detonations and is conducted during all phases of On-Site Inspection (OSI). There are many objects, signatures, and landscape changes indicative of testing activities that are visible at different scales. What is identified as a possible signature from the ground, overflights, and satellite...
