It's usually referred to as an "x sigma event". A paper I really like on this is "How Unlucky is 25-Sigma?" https://arxiv.org/abs/1103.5672 https://arxiv.org/ab

It's usually referred to as an "x sigma event". A paper I really like on this is "How Unlucky is 25-Sigma?" https://arxiv.org/abs/1103.5672 https://arxiv.org/abs/1103.5672.