Antarctic sea ice levels dive in 'five-sigma event' (abc.net.au)
https://www.abc.net.au/news/2023-07-24/antarctic-sea-ice-lev...
34 points by adrian_mrd 1 day ago https://news.ycombinator.com/item?id=36839757
has it a bit over five sigma and easily less than six.
Still hella significant.