The McLaren driver crashed heavily on the third lap of the race when his car snapped out of control at the Turn 11 left-hander.
After the race his team boss Andrea Stella highlighted a bump at that point of the track, suggesting that needed to be flattened out next year.
However, speaking for the first time since the accident, Norris suggested his off was caused by a perfect storm of factors, with the bump just one of them.
“A combination of things,” he said when asked about the cause. “The obvious one being there is quite a big bump there. Then cold tyres, so therefore lower ride heights than what you are normally running with.
“The first time following a lot of cars through all of this, you have even less downforce than what you already have. And then a couple of other little things in the background that just made this bump have a bigger effect than what it normally has.
“I think I've somehow must have caught it at a worse angle than normal. I always knew there was a bump there.
“But just for some reason, the effects of it on this one lap seemed a lot bigger than what it had done previously. So just a little bit unlucky at the same time."
Source: Autosport