The waveform from the USGS seismometer that detected the North Korean “earthquake” that happened Monday near Sungjibaegam, off of Nuclear Test Road, looks very similar to the waveform of the 2009 nuclear test North Korea performed.
That test registered a 4.5 magnitude, shown in blue, where today’s registered a 4.9, the red waveform. The South Korean estimate is that the bomb may have been between 6 and 7 kilotons. Estimates for the 2009 test indicated the blast was about 2.5 kilotons.
By comparison, the nuclear bombs dropped by the US on Hiroshima produced a 16 kiloton explosion.
Photo: Andy Frassetto @drrocks1982
— Andy Frassetto (@drrocks1982) February 12, 2013
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