scholarly journals International Monitoring System Correlation Detection at the North Korean Nuclear Test Site at Punggye‐ri with Insights from the Source Physics Experiment

2015 ◽  
Vol 86 (4) ◽  
pp. 1160-1170 ◽  
Author(s):  
Sean R. Ford ◽  
William R. Walter
Keyword(s):  
Monitoring System ◽  
Test Site ◽  
Nuclear Test ◽  
International Monitoring System ◽  
The North ◽  
International Monitoring ◽  
Physics Experiment ◽  
Source Physics

scholarly journals A Multi-Technology Analysis of the 2017 North Korean Nuclear Test

2018 ◽  
Author(s):  
Peter Gaebler ◽  
Lars Ceranna ◽  
Nima Nooshiri ◽  
Andreas Barth ◽  
Simone Cesca ◽  
...  
Keyword(s):  
Monitoring System ◽  
Body Wave ◽  
Test Site ◽  
Nuclear Test ◽  
International Monitoring System ◽  
Seismic Stations ◽  
Technology Analysis ◽  
Tnt Equivalent ◽  
International Monitoring ◽  
Strong Surface

Abstract. On September 3rd 2017 official channels of the Democratic People's Republic of Korea announced the successful test of a thermonuclear device. Only seconds to minutes after the alleged nuclear explosion at the Punggye-ri nuclear test site in the mountainous region in the country's northeast at 03:30:02 (UTC) hundreds of seismic stations distributed all around the globe picked up strong and distinct signals associated with an explosion. Different seismological agencies reported body wave magnitudes of well above 6.0, consequently estimating the explosive yield of the device in the order of hundreds of kilotons TNT equivalent. The 2017 event can therefore be assessed being multiple times larger in energy than the two preceding events in January and September 2016. This study provides a multi-technology analysis of the 2017 North Korean event and its aftermath using a wide array of geophysical methods. Seismological investigations locate the event within the test site at a depth of approximately 0.8 km below surface. The radiation and generation of P- and S-wave energy in the source region is significantly influenced by the topography of the Mt. Mantap massif. Inversions for the full moment tensor of the main event reveal a dominant isotropic component accompanied by significant amounts of double couple and compensated linear vector dipole terms, confirming the explosive character of the event. Analysis of the source mechanism of an aftershock that occurred around eight minutes after the test in the direct vicinity suggest a cavity collapse. Measurements at seismic stations of the International Monitoring System result in a body wave magnitude of 6.2, which translates to an yield estimate of around 400 kilotons TNT equivalent. The explosive yield is possibly overestimated, since topography and depth phases both tend to ehance the peak amplitudes of teleseismic P-waves. Interferometric Synthetic-Aperture-Radar analysis using data from the ALOS-2 satellite reveal strong surface deformations in the epicenter region. Additional multispectral optical data from the Pleiades satellite show clear landslide activity at the test site. The strong surface deformations generated large acoustic pressure peaks, which were observed as infrasound signals with distinctive waveforms even in distances of 400 km. In the aftermath of the 2017 event atmospheric traces of the fission product 133Xe have been detected at various locations in the wider region. While for 133Xe measurements in September 2017 the Punggye-ri test site is disfavored as source by means of atmospheric transport modeling, detections in October 2017 at the International Monitoring System station RN58 in Russia indicate a potential delayed leakage of 133Xe at the test site from the 2017 North Korean nuclear test.

scholarly journals A multi-technology analysis of the 2017 North Korean nuclear test

Solid Earth ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 59-78 ◽  
Author(s):  
Peter Gaebler ◽  
Lars Ceranna ◽  
Nima Nooshiri ◽  
Andreas Barth ◽  
Simone Cesca ◽  
...  
Keyword(s):  
Monitoring System ◽  
Body Wave ◽  
Test Site ◽  
Nuclear Test ◽  
International Monitoring System ◽  
Seismic Stations ◽  
Technology Analysis ◽  
Tnt Equivalent ◽  
International Monitoring ◽  
Strong Surface

Abstract. On 3 September 2017 official channels of the Democratic People's Republic of Korea announced the successful test of a thermonuclear device. Only seconds to minutes after the alleged nuclear explosion at the Punggye-ri nuclear test site in the mountainous region in the country's northeast at 03:30:02 (UTC), hundreds of seismic stations distributed all around the globe picked up strong and distinct signals associated with an explosion. Different seismological agencies reported body wave magnitudes of well above 6.0, consequently estimating the explosive yield of the device on the order of hundreds of kT TNT equivalent. The 2017 event can therefore be assessed as being multiple times larger in energy than the two preceding North Korean events in January and September 2016. This study provides a multi-technology analysis of the 2017 North Korean event and its aftermath using a wide array of geophysical methods. Seismological investigations locate the event within the test site at a depth of approximately 0.6 km below the surface. The radiation and generation of P- and S-wave energy in the source region are significantly influenced by the topography of the Mt. Mantap massif. Inversions for the full moment tensor of the main event reveal a dominant isotropic component accompanied by significant amounts of double couple and compensated linear vector dipole terms, confirming the explosive character of the event. The analysis of the source mechanism of an aftershock that occurred around 8 min after the test in the direct vicinity suggest a cavity collapse. Measurements at seismic stations of the International Monitoring System result in a body wave magnitude of 6.2, which translates to an yield estimate of around 400 kT TNT equivalent. The explosive yield is possibly overestimated, since topography and depth phases both tend to enhance the peak amplitudes of teleseismic P waves. Interferometric synthetic aperture radar analysis using data from the ALOS-2 satellite reveal strong surface deformations in the epicenter region. Additional multispectral optical data from the Pleiades satellite show clear landslide activity at the test site. The strong surface deformations generated large acoustic pressure peaks, which were observed as infrasound signals with distinctive waveforms even at distances of 401 km. In the aftermath of the 2017 event, atmospheric traces of the fission product 133Xe were detected at various locations in the wider region. While for 133Xe measurements in September 2017, the Punggye-ri test site is disfavored as a source by means of atmospheric transport modeling, detections in October 2017 at the International Monitoring System station RN58 in Russia indicate a potential delayed leakage of 133Xe at the test site from the 2017 North Korean nuclear test.

scholarly journals Radioxenon detections in the CTBT international monitoring system likely related to the announced nuclear test in North Korea on February 12, 2013

2014 ◽  
Vol 128 ◽  
pp. 47-63 ◽  
Author(s):  
A. Ringbom ◽  
A. Axelsson ◽  
M. Aldener ◽  
M. Auer ◽  
T.W. Bowyer ◽  
...  
Keyword(s):  
Monitoring System ◽  
North Korea ◽  
Nuclear Test ◽  
International Monitoring System ◽  
International Monitoring

scholarly journals ZÁZNAMY SEVEROKOREJSKÝCH JADERNÝCH EXPLOZÍ NA SEISMICKÉ STANICI VRAC

2013 ◽  
Vol 20 (1-2) ◽  
Author(s):  
Josef Havíř
Keyword(s):  
Monitoring System ◽  
Seismic Station ◽  
Nuclear Test ◽  
International Monitoring System ◽  
Nuclear Explosions ◽  
International Monitoring ◽  
Test Ban ◽  
Natural Earthquakes ◽  
Nuclear Test Ban ◽  
Test Ban Treaty

Seismic station VRAC operated by IPE (Institute of Physics of the Earth) is part of the International Monitoring System CTBTO (Comprehensive Nuclear-Test-Ban Treaty Organization). This monitoring system is built for verifi cation of the compliance with the Comprehensive Nuclear-Test-Ban Treaty. Station VRAC provided important registration of the nuclear explosions. Last explosions were carried out on the territory Democratic People’s Republic of Korea (DPRK), latest North Korean nuclear test was conducted this year (12. 2. 2013). Station VRAC recorded signal of all North Korean nuclear explosions. Registrations by stations of International Monitoring System, including station VRAC, significantly contributed to improving of the discrimination techniques, mainly to improving the discrimination between natural earthquakes and explosions based on the analyses of Ms and mb magnitudes.

Status report on the establishment of the Comprehensive Nuclear‐Test‐Ban Treaty (CTBT) International Monitoring System (IMS) infrasound network

2002 ◽  
Vol 112 (5) ◽  
pp. 2352-2352
Author(s):  
J. A. Vivas Veloso ◽  
D. R. Christie ◽  
P. Campus ◽  
M. Bell ◽  
T. L. Hoffmann ◽  
...  
Keyword(s):  
Monitoring System ◽  
Nuclear Test ◽  
Status Report ◽  
International Monitoring System ◽  
International Monitoring ◽  
Test Ban ◽  
Nuclear Test Ban ◽  
Test Ban Treaty
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