Ask HN: story about uk insurance underwriter and cosmic rays?

A few months back was a story regarding the 1800's and a bright light in the middle of the night that got people up, who thought the day was starting. The story reflected on this true event from the perspective of a current uk insurance underwriters perspective. Does anyone have a link to that original hacker news article? I would love to reflect on it further, it was dystopian future possibility after a large solar release.