Continuing frequency deviation in the Continental European Power System
Related (and 7 years old) article concerning US grid: "Power grid change may disrupt clocks" [0]. It was on HN [1], but with just two comments.[0] https://web.archive.org/web/20110701065839/http://old.news.y...[1] https://news.ycombinator.com/item?id=2703264