[학술논문] Monitoring North Korea Nuclear Tests: Comparison of 1st and 2nd Tests
...tests show very similar pattern with different scale level. In addition, the corner frequencies of P wave of 1st and 2nd tests at each station show no or negligible difference. This indicates the burial depths of two tests might be very similar. The relative yield amount of the 2nd test is estimated 8 times larger than that of the 1st from the weighted average of ground-velocity amplitude ratios.
[학위논문] 북한 지하 대규모 발파의 발파원 특성 및 한반도 주변 지각 속도 구조 연구
...thesis, by analyzing the regional Rayleigh waves from the 2 North Korean underground nuclear explosion. The estimated yield from the surface-wave magnitude was abnormally higher than that from the body-wave magnitude. The effect of geological properties at the test site on the yield overestimation has been studied in relation with other test sites. In addition, the source characteristics of the explosions...