For the past month our website has an enormous increase of traffic. But this increase stays only 30 minutes. Google drives 5 times more visitors to the same pages, which usually drives us traffic. We can see this on the graphs online. Usual number of online visitors is 700. On the spike it can be 1800-1900. I have cleared cookies, used proxy to check google position and they are the same as previously. We get this bounce around each 3 days. Actually when we see daily UV graph, this spike is not visible. Only in daily online graph. Any idea what should i do, what changes should i make, to "save" this traffic? Any experience with that? Same situation was with our other websites, but after a month or two it just stopped and we stayed with same traffic. It is not country related.