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 So Gu Kim.Forensic Seismology and Boundary Element Method Application vis-à-vis ROKS Cheonan Underwater Explosion[J].Journal of Marine Science and Application,2013,(4):422-433.[doi:10.1007/s11804-013-1213-y]
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Forensic Seismology and Boundary Element Method Application vis-à-vis ROKS Cheonan Underwater Explosion


Forensic Seismology and Boundary Element Method Application vis-à-vis ROKS Cheonan Underwater Explosion
So Gu Kim
So Gu Kim
Korea Seismological Institute, Goyang 410734, Republic of Korea
cepstrum spectrogram bubble pulse toroidal bubble boundary element method ICCP forensic seismology underwater explosion
On March 26, 2010 an underwater explosion (UWE) led to the sinking of the ROKS Cheonan. The official Multinational Civilian-Military Joint Investigation Group (MCMJIG) report concluded that the cause of the underwater explosion was a 250 kg net explosive weight (NEW) detonation at a depth of 6?9 m from a DPRK “CHT-02D” torpedo. Kim and Gitterman (2012a) determined the NEW and seismic magnitude as 136 kg at a depth of approximately 8m and 2.04, respectively using basic hydrodynamics based on theoretical and experimental methods as well as spectral analysis and seismic methods. The purpose of this study was to clarify the cause of the UWE via more detailed methods using bubble dynamics and simulation of propellers as well as forensic seismology. Regarding the observed bubble pulse period of 0.990 s, 0.976 s and 1.030 s were found in case of a 136 NEW at a detonation depth of 8 m using the boundary element method (BEM) and 3D bubble shape simulations derived for a 136 kg NEW detonation at a depth of 8 m approximately 5 m portside from the hull centerline. Here we show through analytical equations, models and 3D bubble shape simulations that the most probable cause of this underwater explosion was a 136 kg NEW detonation at a depth of 8m attributable to a ROK littoral “land control” mine (LCM).


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Last Update: 2013-11-14