I have a keyword that for the last 18 months has been ranked #1 in Google steadily. 4 days ago, I noticed a drop in my webtraffic. I went to Google and found that my site for the keyword was nonexistant in the returns. Not even ranked in the top 1000 results. It simply vanished. 4 hours later, I tried again and I was #1 again.
The next morning I woke up and checked. Again, my site was non-existant. Then hours later, I was back at #1. Back and forth it has been doing this for 4 days now. Also, its not that my site is "shifting" for the keyword in the returns, it is completely vanishing. Then it comes back to #1. In my Google Webmaster tools, it lists my keyword as #1, so at least in the tools area, Google thinks I should be #1. But right now (as I post this), I am nonexistant. Also, this keyword is not new for me, I have been #1 in Google for it for almost 2 years for the same page on my site.
Can anyone offer me an idea why Google is now oscillating me from #1 to nonexistant back and forth? The site that is #2 for that keyword is constant. That is, when I am ranked #1, it is ranked #2. When I go non-existant, it goes to #1. So all other sites for that keyword are constant. I am the only site that keeps getting wiped.