ALPHA PARTICLE ERRORS. “A 2011 Black Hat paper discusses the real-life security implications of such bit-flips in the Internet’s DNS system. The paper found up to 3,434 incorrect requests per day due to bit-flip changes for various common domains. Many of these bit-flips would probably be attributable to hardware problems, but some could be attributed to alpha particles.”
https://en.m.wikipedia.org/wiki/Soft_error