Cosmic rays causing 30k network malfunctions in Japan each year
Kind of a fun ancedote: In "the old days" when you'd run a server room in your office we had a very large HPC cluster + a significant amount of storage and other one off servers on the top floor of a mid rise office building. I eventually moved it all to a former nuclear fallout facility where our systems were three floors down and under a gigantic pool of water. Error rates and random crashes fell off IMMEDIATELY. 
I believe Microsoft reported similar findings with their submerged data center.