CTBT: Science and Technology Conference 2023 - SnT2023

Session

O2.1 Characterization of Treaty-Relevant Events

O2.1

Jun 22, 2023, 2:40 PM

Prinz Eugen Saal

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)

326. Bayesian Inversion of Seismograms for Source Parameters of Contained Democratic People's Republic of Korea Underground Nuclear Explosions (O2.1-326)

Mr Anton Ziolkowski (University of Edinburgh)

6/22/23, 2:45 PM

T2.1 Characterization of Treaty-Relevant Events

Oral

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...

164. Collapse Events and Treaty Monitoring (O2.1-164)

Mr Michael Pasyanos (Lawrence Livermore National Laboratory (LLNL))

6/22/23, 3:00 PM

T2.1 Characterization of Treaty-Relevant Events

Oral

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...

638. Systematic Seismic Events Discrimination at Kenya National Data Centre (O2.1-638)

Josphat Kyalo Mulwa (University of Nairobi, Department of Earth and Climate Sciences)

6/22/23, 3:15 PM

T2.1 Characterization of Treaty-Relevant Events

Oral

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...

290. Using Moment Tensor Inversions for Rapid Seismic Source Characterization: From Nuclear and Regional Seismicity Monitoring to Tsunami Warning (O2.1-290)

Ms Aurelie Guilhem Trilla (Commissariat à l’énergie atomique et aux énergies alternatives (CEA))

6/22/23, 4:00 PM

T2.1 Characterization of Treaty-Relevant Events

Oral

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...

118. STM_toolkit: a Radionuclide Source-term Modeling Package for Rapid Scenario Determinations at the French NDC (O2.1-118)

Eric Pili (Commissariat à l’énergie atomique et aux énergies alternatives (CEA))

6/22/23, 4:15 PM

T2.1 Characterization of Treaty-Relevant Events

Oral

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...