Conveners
O2.1 Characterization of Treaty-Relevant Events: part 1
- Mohamed Nabil Mohamed ElGabry (National Research Institute of Astronomy and Geophysics (NRIAG))
- Boxue Liu (CTBTO Preparatory Commission)
- Mario Zampolli (CTBTO Preparatory Commission)
O2.1 Characterization of Treaty-Relevant Events: part 2
- Mohamed Nabil Mohamed ElGabry (National Research Institute of Astronomy and Geophysics (NRIAG))
- Boxue Liu (CTBTO Preparatory Commission)
- Mario Zampolli (CTBTO Preparatory Commission)
Source parameters and source time functions of the five contained Democratic People's Republic of Korea underground nuclear explosions, 2009-2017, are obtained from MDJ seismograms by Bayesian inversion. The test site is a few kilometres across. Therefore, the Earth impulse response, or Green’s function, from each event to a given distant seismometer, is essentially the same. The Green’s...
Besides earthquakes, other sources can generate seismic and other observable geophysical signals that could potentially be misidentified or misinterpreted as explosions. One common source of such signals are collapses which, like explosions, are generally shallow and, consequently, have many identifying features similar to explosions. In this study, we collect, analyze and characterize...
The International Data Centre routinely applies event screening or discrimination in order to characterize events as either natural or anthropogenic. A number event discriminants are presented in literature. At the Kenya National Data Centre (KE-NDC), a systematic and step by step procedure of events discrimination are applied to seismic events. Results from the discriminants adopted are...
Rapid full source characterization provides useful information after the occurrence of an event of interest such as a nuclear test. Techniques using full moment tensor inversions based on long-period seismic waveforms recorded at regional distance helps to confirm the isotropic component of a seismic source, if any. Used on a grid of potential locations and by scanning continuous seismic...
Besides improved instrumentation and operational measurement analysis, radionuclide technology used at National Data Centres (NDCs) also benefits from atmospheric transport modeling (ATM) in their dedication to detect, discriminate and characterize nuclear explosions. A way to enhance NDC expertise is to provide ATM with a likely radionuclide source term emitted to the atmosphere following...
