It seems there was a failed launch of a Russian rocket from Lake Ladoga yesterday morning, after all. Current theory is that the spinning circle was sunlight reflecting off of spilled rocket fuel, and the black circle was the rocket being destroyed.
I still want to know what caused the blue glow, though.
Video here, and a gabillion other places
I still want to know what caused the blue glow, though.
Video here, and a gabillion other places