A tip of the hat to Ed Kohler over at Technology Evangelist for spotting that Technorati has a new way to rank blogs. Before last Friday, Technorati's ranking was by the number of inbound links. Now, it's by "Authority."
How do you calculate Authority? As Dorion Carroll explains, "Technorati Authority is the number of blogs linking to a website in the last six months. The higher the number, the more Technorati Authority the blog has."
Isn't that the same thing by a new name? No, it isn't. As Carroll goes on to explain, "It is important to note that we measure the number of blogs, rather than the number of links. So, if a blog links to your blog many times, it still only count as +1 toward your authority."
So, for those who are focused on ranking, ranking, any ranking, how has this new definition changed The Technorati Top 100?
Engadget ranks #1. Boing Boing ranks #2. Gizmodo ranks #3. Techcrunch ranks #4. The Huffington Post ranks #5.
The Official Google Blog ranks #13. GigaOM ranks #33. The Topix.net Weblog ranks #35. Scobleizer ranks #38. Google Blogoscoped ranks #57. ShoeMoney ranks #60. Valleywag ranks #64. Micro Persuasion ranks #66. Matt Cutts ranks #72. Search Engine Land ranks #78. And the Online Marketing Blog ranks #96.
So, the change in Technorati ranking won't have the same impact as the Florida update to Google's algorithm did back in the fall of 2003. But I'm sure that it will cause more than a few ripples in the search engine industry.