Speaker
Description
During any on-site inspection programme of the Comprehensive Nuclear-Test-Ban Treaty (CTBT), field geophysics applications used after results from the initial inspection period indicate the need for further investigation. Ground Penetration Radar, resonance seismometry, active seismic survey, electrical resistivity surveys, gravitational and magnetic mapping are the main geophysical methods used. In this study, magnetotelluric and electrical resistivity surveys were compared by conducting electrical resistivity and magnetotelluric surveys over a successful saline water capped borehole that was likened to be a nuclear test hole. Results from both surveys were able to pick the position of the saline water which indicate the ability of both methods to investigate underground nuclear test explosion sites. Besides, the magnetotelluric survey was able to infer deeper conductive zones far beyond the depth of the borehole. This suggest that the magnetotelluric survey investigates greater depths and can identify cavities that might be created by an underground nuclear test explosion.
| [email protected] |
