S. Korean Defense Ministry now says that the yield is 6~7 kilotons, while another report said that it was about 10 kilotons. So the yield estimate ranges from a third to a half of Hiroshima nuke.
Wonder if they will write a stern letter. Wonder what the Russkiyes will say or do?
Japan says they are going ahead probably with their own set of sanctions, but then again, how effective can *that* be?
If the last one was 3 kilotons, this would be 33?