Google changes SERP every day. But if your site drop so dramatically, you may need to have a check on your site. Have you linked to bad neighbors or doing anything that is not allowed?
You are right. But these updates are not happening on authority sites.. It's only for the newer ones that are1-2 years old.
this is no reason to very about your site. weat at lest 10 days may you got your ranking back again. this is happen some time when you modify your site page.
My site has been between 1st and 3rd on the first page for the pass 2 weeks, its just google, relax and make sure you keep building great links and adding fresh content
I experience the same problem with one of my pages that went from page 1 to 2. It drops amount of visits by 1000-2000. So, I really get frustrated.
i think its because i have a affiliate template i have another affiliate affiliate and have not drop in ranking in this one i have unique meta tittle and url
Even if your SEO is squeaky clean white, Google is constantly messing with their algorithm and rankings fluctuate. However, a drop that big usually means something is going on with your site, or Google found something (or many things) they really didn't like. In other words, if your rankings don't return soon, you've probably been penalized for something.
My site has been dancing with google for the past few weeks but its settled down now, and I am 2nd so very happy about that.
You must yield to the God google comply or you will be remove from index and will have to pray to the lesser gods yahoo and bing but they to follow their god which is google.
I went from page 2 to page 8 and 2 weeks later I was at page 3. Shia't happens man, but if it was easy everyone would be ranked #1. Wait, that's not even possible.