Mines on the first day of the Somme

On the morning of 1 July 1916, the first day of the Battle of the Somme during World War I, underground explosive charges planted by British tunnelling units were detonated beneath the German front lines. The joint explosion of these mines ranks among the largest artificial non-nuclear explosions.

Source: Wikipedia — Mines on the first day of the Somme (CC BY-SA 4.0)