Seismic security

The Earth moved for Kim! North Korean nuclear test 10 times more powerful than the Hiroshima bomb tests moved the planet's crust say experts as they detect aftershocks

Two tremors detected in North Korea yesterday were likely to be aftershocks from the hermit nation's reckless nuclear test in early September, a US Geological Survey official confirmed.

The mild 2.9 and 2.4 magnitude aftershocks were confirmed as 'tectonic' in origin by the Vienna-based Comprehensive Nuclear-Test-Ban Treaty executive secretary Lassina Zerbo.

The USGS official claimed the tremors originated near the Punggye-ri nuclear test site - the location where North Korea carried out its largest nuclear test to date on September 3.

The official said: 'They're probably relaxation events from the sixth nuclear test. When you have a large nuclear test, it moves the Earth's crust around the area, and it takes a while for it to fully subside. 

'We've had a few of them since the sixth nuclear test.'

North Korea claim its September test was a H-bomb - with experts claiming it was an estimated 10 times more powerful than the US atomic bomb which was dropped on Hiroshima in 1945.