Google translate of the first tweet (in German): > Extreme nightcap in the #network frequency. Quite unusual at this height and at this point in time. One of

Google translate of the first tweet (in German): > Extreme nightcap in the #network frequency. Quite unusual at this height and at this point in time. One of my measuring devices even shows 49.74Hz as a minimum. Has a major #power plant failed somewhere? And second tweet: >Here is another representation of the # mains frequency from just now. Extremely unusual, as a malfunction is to be suspected. Unfortunately, none of my network analyzers are currently running to check the exact course.