The camera does the same with shots of Aurora angelize. What we see with our eye in that instant is no where near as intense as what the camera catches with a slow shutter speed where rays might move up and down doz of times on a open shutter for 30sec or more.
It is amazing what the camera will capture that the eye does not see at times when it comes to optics. Great fun and some wonderful surprises, you have a special shot there, something different to the normal sunset. I enjoyed it very much.