My thanks to avcat for forwarding me this story from Michael Yon's outstanding blog. The photos are outstanding. The story will make you cry.
St. Elmo's Fire runs actinic-white to blue; whereas these exhibit the typical heating paradigm of a meteor, going red-orange-yellow-white. I suspect it is more that the high-speed boundary layer of air on the rotors is creating dust particle meteor swarms as the particles are instantly heated to vaporization. I like Michael's name for it - the Kopp-Etchells Effect.