There's talk of a Google update going on right now, but my old pal Dixon Jones has pointed out that an update may not be what it first seems. https://www.webmasterworld.com/analytics/4752749.htm
It's a valid point, and next time you're concerned over traffic and Google updates, it may be worth considering other issues, such as DNS outages, are at play.
The Interenet Traffic report is one of my regular destinations just to get an indication of what's going on. Pretty much everyone is affected by those problems, in some shape of form, and it could be a browsing problem, an error from google failing to locate, or to spider a site, or just an error within Google's servers. Unlikely, i'm sure as Google will have resilience built in.