scholarly journals Simulation of topographic effects on seismic waves from shallow explosions near the North Korean nuclear test site with emphasis on shear wave generation

2010 ◽  
Vol 115 (B11) ◽  
Author(s):  
Arthur J. Rodgers ◽  
N. Anders Petersson ◽  
Bjorn Sjogreen
Keyword(s):  
Shear Wave ◽  
Seismic Waves ◽  
Test Site ◽  
Wave Generation ◽  
Nuclear Test ◽  
Topographic Effects ◽  
The North

scholarly journals Seismological investigation of the 2016 January 6 North Korean underground nuclear test

2016 ◽  
Vol 206 (3) ◽  
pp. 1487-1491 ◽  
Author(s):  
Lian-Feng Zhao ◽  
Xiao-Bi Xie ◽  
Wei-Min Wang ◽  
Jin-Lai Hao ◽  
Zhen-Xing Yao
Keyword(s):  
Body Wave ◽  
Broad Band ◽  
Test Site ◽  
Nuclear Test ◽  
The Body ◽  
The North ◽  
Nuclear Tests ◽  
Master Event ◽  
Fully Coupled ◽  
Body Wave Magnitude

Abstract Seismology plays an important role in characterizing potential underground nuclear tests. Using broad-band digital seismic data from Northeast China, South Korea and Japan, we investigated the properties of the recent seismic event occurred in North Korea on 2016 January 6. Using a relative location method and choosing the previous 2006 explosion as the master event, the 2016 event was located within the North Korean nuclear test site, with its epicentre at latitude 41.3003°N and longitude 129.0678°E, approximately 900 m north and 500 m west of the previous event on 2013 February 12. Based on the error ellipse, the relocation uncertainty was approximately 70 m. Using the P/S spectral ratios, including Pg/Lg, Pn/Lg and Pn/Sn, as the discriminants, we identify the 2016 event as an explosion rather than an earthquake. The body-wave magnitude calculated from regional wave Lg is mb(Lg) equal to 4.7 ± 0.2. Adopting an empirical magnitude–yield relation, and assuming that the explosion is fully coupled and detonated at a normally scaled depth, we find that the seismic yield is about 4 kt, with the uncertainties allowing a range from 2 to 8 kt.

Elastic wave propagation in heterogeneous media

1970 ◽  
Vol 60 (3) ◽  
pp. 769-784 ◽  
Author(s):  
Paul R. Beaudet
Keyword(s):  
Wave Propagation ◽  
Wave Equation ◽  
Seismic Waves ◽  
Heterogeneous Media ◽  
Heterogeneous Medium ◽  
Test Site ◽  
Nuclear Test ◽  
Field Observations ◽  
Nevada Test Site ◽  
Test Program

Abstract The wave equation is solved for the ensemble average of particle displacements produced by an explosion. The explosion is assumed to occur in a finite cavity in an infinite heterogeneous medium. The solution is applied to the seismic waves generated by an underground nuclear detonation. Field observations from the underground nuclear test program at the Nevada Test Site are in qualitative agreement with the theory.

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