2nd North Korean Blast

The US has detected a second blast in North Korea:


US intelligence has detected an explosion of less than one kilotonne in magnitude in North Korea but has not been able to determine whether it was nuclear or not, a senior intelligence official said.

The official, who asked not to be identified, said that first-time nuclear tests historically have been in the several kilotonne range.

“We are aware that there was a sub-kilotonne explosion in North Korea,” said the official. “We have not been able to determine at this point whether it was in fact nuclear.”