Fukushima changed the rotation of the earth as well (http://www.nasa.gov/topics/earth/features/japanquake/earth20110314.html http://www.nasa.gov/topics/earth/fe

Fukushima changed the rotation of the earth as well (http://www.nasa.gov/topics/earth/features/japanquake/earth20110314.html http://www.nasa.gov/topics/earth/features/japanquake/earth20...) I think there are calculations on nuke tests and rotation as well but I'd expect they'd be a much smaller scale.