 This could suggest – depending upon the geological make-up of the test site – a yield of 2–12 kT".An official in France's Atomic Energy Commission reported that they estimated the blast was "about or less than a kiloton" and expressed uncertainty about whether or not the blast was actually nuclear.There have been various large planned and unplanned non-nuclear explosions comparable in yield to small nuclear detonations, such as the U.S. "Minor Scale" explosion from 1985, which used conventional explosives to simulate a 4 kiloton detonation.