The explosion, at shooting time, 4:00 p.m., was caused by a blown-out shot in the first cross entry off the third right entry.
Dust was ignited, and, as the explosion spread, several kegs of black powder were touched off, giving additional force. All shooting was done on the solid, using black powder. There was little violence but intense heat. Trees outside the pit mouth were covered with soot and dust.
Twenty men were in the mine; 11 were killed by violence or burns; 3 escaped through an outcrop opening, and 6 came out a short way through afterdamp and escaped unassisted.
The mine was free of gas and was ventilated by a furnace. The dust was moist, but the mine was not wet.