High‐Precision Relocation and Event Discrimination for the 3 September 2017 Underground Nuclear Explosion and Subsequent Seismic Events at the North Korean Test Site

2018 ◽  
Author(s):  
Xi He ◽  
Lian‐Feng Zhao ◽  
Xiao‐Bi Xie ◽  
Zhen‐Xing Yao
Keyword(s):  
High Precision ◽  
Nuclear Explosion ◽  
Test Site ◽  
Seismic Events ◽  
Underground Nuclear Explosion ◽  
The North

Genotoxicity and cytotoxicity assay of water sampled from the underground nuclear explosion site in the north of the Perm region (Russia)

2005 ◽  
Vol 80 (1) ◽  
pp. 59-74 ◽  
Author(s):  
Tatiana I. Evseeva ◽  
Stanislav A. Geras'kin ◽  
Ida I. Shuktomova ◽  
Anatoliy I. Taskaev
Keyword(s):  
Nuclear Explosion ◽  
Cytotoxicity Assay ◽  
Underground Nuclear Explosion ◽  
The North ◽  
Perm Region

Identification of Seismic Events on and near the North Korean Test Site after the Underground Nuclear Test Explosion of 3 September 2017

2018 ◽  
Author(s):  
Won‐Young Kim ◽  
Paul G. Richards ◽  
David Schaff ◽  
Eunyoung Jo ◽  
Yonggyu Ryoo
Keyword(s):  
Test Site ◽  
Nuclear Test ◽  
Seismic Events ◽  
The North

Distribution, focal mechanisms, and frequency of earthquakes in the Fairview Peak area, Nevada, near the time of the BENHAM explosion

1972 ◽  
Vol 62 (5) ◽  
pp. 1223-1240 ◽  
Author(s):  
B. E. Smith ◽  
J. M. Coakley ◽  
R. M. Hamilton
Keyword(s):  
Fault Plane ◽  
Nuclear Explosion ◽  
Test Site ◽  
Underground Nuclear Explosion ◽  
Nevada Test Site ◽  
Vertical Orientation ◽  
Fault Plane Solutions ◽  
Pressure Axis ◽  
Tension Axis ◽  
The One

Abstract Six portable seismographs were operated for 30 days in a network centered 25 km south of the epicenter of the 1954 Fairview Peak earthquake. The recording period lasted from 15 days before to 15 days after detonation of the one-megaton BENHAM underground nuclear explosion 250 km to the southeast of the Nevada Test Site on December 19, 1968. Approximately 950 earthquakes were detected within about 30 km of the network. No evidence was found that the explosion affected the rate of earthquake occurrence. Locations were computed for 152 earthquakes. The epicentral pattern shows north and northeast trends about 1 to 3 km wide. Focal depths range from 5 to 14 km. The main zones of activity seem to have a near-vertical orientation. Composite fault-plane solutions suggest that faulting within zones is not consistent with a single focal mechanism. Instead, a variety of mechanisms is indicated, consisting primarily of north-striking right-lateral oblique-slip, and northeast-striking dip-slip movements. In both cases, the pressure axis is near vertical and the tension axis is near horizontal, striking about S60°E.

Effect of a fault on explosion-generated ground shock spectra

1968 ◽  
Vol 58 (6) ◽  
pp. 2033-2041
Author(s):  
Frank W. Galbraith
Keyword(s):  
Fault Zone ◽  
High Frequency ◽  
Atomic Energy Commission ◽  
Ground Surface ◽  
Test Site ◽  
Underground Nuclear Explosion ◽  
Nevada Test Site ◽  
High Frequency Response ◽  
The North ◽  
Ground Shock

ABSTRACT Shock spectrum measurements were made for an underground nuclear explosion at the Nevada Test Site of the U. S. Atomic Energy Commission using 29 reed gages. The objective of the measurements was to determine the effect of a fault zone on shock spectra measured at the ground surface and generated by the explosion. The reed gages were located along two gage lines; one extended to the west and crossed the fault at right angles. The other gage line extended to the north and was generally parallel to the fault. The results showed that the fault zone had an effect on vertical spectra but not on horizontal radial spectra. The vertical gage directly on the fault showed significantly lower displacements for all frequencies above 3 cycles per second but showed no apparent effect on the 3 cps displacement. For gages beyond the fault the vertical spectra for frequencies higher than 3 cps were greater than for corresponding gages along the north gage line. It is believed that this was caused by the upthrust base rock on the side of the fault away from the explosion with a resultant decreased thickness of tuff and alluvium. This resulted in less attenuation of high frequency response than was expected.

scholarly journals Geomagnetic conjugate observations of ionospheric disturbances in response to a North Korean underground nuclear explosion on 3 September 2017

2019 ◽  
Vol 37 (3) ◽  
pp. 337-345
Author(s):  
Yi Liu ◽  
Chen Zhou ◽  
Qiong Tang ◽  
Guanyi Chen ◽  
Zhengyu Zhao
Keyword(s):  
Electric Field ◽  
Nuclear Explosion ◽  
Test Site ◽  
Conjugate Points ◽  
Ionospheric Disturbances ◽  
Underground Nuclear Explosion ◽  
International Gnss Service ◽  
Swarm Satellites ◽  
Electric Field Penetration ◽  
Field Penetration

Abstract. We report observations of ionospheric disturbances in response to a North Korean underground nuclear explosion (UNE) on 3 September 2017. By using data from IGS (International GNSS Service) stations and Swarm satellites, geomagnetic conjugate ionospheric disturbances were observed. The observational evidence showed that UNE-generated ionospheric disturbances propagated radially from the UNE epicenter with a velocity of ∼280 m s−1. We propose that the ionospheric disturbances are results of electrodynamic process caused by LAIC (lithosphere–atmosphere–ionosphere coupling) electric field penetration. The LAIC electric field can also be mapped to the conjugate hemispheres along the magnetic field line and consequently cause ionospheric disturbances in conjugate regions. The UNE-generated LAIC electric field penetration plays an important role in the ionospheric disturbances in the region of the nuclear test site nearby and the corresponding geomagnetic conjugate points.

Sign in / Sign up

Export Citation Format

Share Document