One of its tasks was to monitor underground nuclear explosions.

On 11 September 1878 it was the site of an underground explosion which killed 268 coal miners.

In Boston, he rescues a child from an underground explosion.

This is the first recorded time that men felt a light earthquake from an underground explosion.

In 1986 a second disaster occurred, as an underground explosion, which took the lives of 12 miners.

"Let us just say that not all of our underground explosions in the 1970's were nuclear."

It's easy to see how an underground explosion can shake the Earth.

On 18 June 1885, an underground explosion at the colliery killed 178 men and boys.

On 11 November 1895, seven men were killed in an underground explosion at the colliery.

The lives of 362 men were lost in the underground explosion.