North Korea conducts its most powerful nuclear test ever The terrifying tremor was detected in the northeast of the country where the Punggye-ri test site is located - but was so strong that it shook buildings in China and Russia.

The terrifying tremor was detected in the northeast of the country where the Punggye-ri test site is located - but was so strong that it shook buildings in China and Russia. North Korea conducts its most powerful nuclear test ever