Below pics are left: after earthquake / right : before earthquake





And it causes a blackout for the whole of Hokkaido, of course, it includes Sakura Internet Ishikari DC . Ishikari DC had worked with an emergency power supply for almost 60 hours(!), so its security mirror run without any error.





Dec 2014, security.debian.org mirror came to Hokkaido, Japan. And in September 2018, Huge earthquake (magnitude 6.7) has hit Hokkaido. It was a surprise because the Japan government said such a large earthquake would shake Hokkaido is less than 0.2% in 30 years.