Referral source dropping off the map?

Years-long--gone overnight

[Clair]

I regularly check Google Analytics for 3 sites--mine, one of my clients who sells guitar books, and one other.

About 10 years ago I make a geeky page that hangs off my server with bass lessons on it. It has been consistently on Google's first page (5-8 in rankings) and got visited 1K-3K times/month. On this page was a link to the publisher of the books. Both are white-hat sites. My domain has been active since 1997. Book site about the same.

When I used GA on the book site, the link from my domain always, always accounted for 10-30% of the daily hits on the book site. As of yesterday, (and again today) there is not one single hit coming from my domain.

I have stared at this until I am blue in the face. No changes have been made to either site in the last couple of months.

Does anyone have any idea of what is going on? I'm am well and truly stumped.

Ideas much appreciated.

[tedster]

Sounds like buggy data to me - the analytics report is not accurately reflcting the real traffic pattern. That's especially so if you still see the bass url ranking on the first page for a good keyword.

Bad data happens, and especially in a big data-set like Google runs, it sometimes seems inevitable. Do you have access to your own server logs to double check?