Google Algorithm Change: Historical Forecasting 
Google is in the middle of their Page Rank, Backlink, and Toolbar exports right now and these typically take a couple days to weeks. These numbers don’t reflect any new information, they just show the changes that have been in effect for the past 2-3 months but haven’t been visible such as Page Rank for new pages or backlinks for new sites.
This is not the big change that can re-arrange the search engine results pages as we know it. That change is reserved for a less frequented occasion. After researching into the patterns that Google has shown in their previous Algorithm updates I have been able to make a prediction of when I think the next major Algorithm change will be and some of the major impacts it could have.
Historically, Google had major updates in their algorithm on the following dates.
1. 04/2001
2. 11/29/2001 (7 months later)
3. 10/14/2002 (11 months later)
4. 11/16/2003 (13 months later)
5. 02/11/2004 (3 months later)
6. 02/03/2005 (12 months later)
7. 10-11/2005 Three separate Algorithm Updates over a month period. (8 months later)
Seeing as how the longest stint Google has gone in the recorded history I could find was 13 months back in 2003 and we are going into month 12 of no algorithm updates, it would be ignorant not to expect the big change within the next month or so.
Because they are in the middle of the current Toolbar, Backlink, and Page Rank update I can not foresee the update happening within the next 2 weeks. I am hypothesizing that their efforts are focused on rolling that project out, getting it off the belt then switching their efforts towards the Algorithm change.
We know its coming, now what should we expect. In order for Google to stay king of the mountain they are going to need to try to remove a lot of the spam that is out there from their index. I have heard about the Class C regulator which will impact a very large part of the SEO and design community. If you have a majority of your backlinks from the same Class C IP address, you might want to give them a hug goodbye… Word on the street is they are going to eliminate duplicate Class C IP address backlinks in order to take away that control that specific industries such as SEO, Development, and Design have over their backlink structures.
A lot has changed over the past year in Search Engines and Google will have to make some directional changes in their algorithm to stay on top. Google’s new Algorithm will also be much smarter in being able to determine bad links from good links. If you are tied into any types of link farms, or bad link neighborhoods I would suggest that you try to take care of those issues now versus once you can’t be found in Google.
In order to provide the most relevant data versus the most optimized, Google will probably adjust the new algorithm to be able to identify any Black Hat SEO tactics that have been used and abused over the past year such as Cloaking, and 302 redirects for both Search Engines and visitors.
What should you take away from this article? Just that we are due for the big one any day now and we should be taking precautions to make sure that we have great SEO friendly site structures with relevant data. Avoid any Black Hat tricks because they probably won’t be working for long.
If you have any inside information or anything else to add to this article, we would love to have your input.