Technorati.com has included the Technorati Authority for blogs listed on the Blog page and in search results. This update changed the earlier references of “N blogs link here” and “X links from Y blogs” with the single Technorati Authority number. On the blog page, we also show the Technorati Rank.
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.
It is important to note that Technorati measures 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. Of course, new links mean the +1 will last another 180 days.
Technorati Rank is calculated based on how far you are from the top. The blog with the hightest Technorati Authority is the #1 ranked blog. The smaller your Technorati Rank, the closer you are to the top.
Since at the lower end of the scale many blogs will have the same Technorati Authority, they will share the same Technorati Rank.
The Technorati Top 100 shows the most popular 100 blogs based on Technorati Authority. The #1 ranked blog is the blog with the most other distinct blogs linking to it in the last 6 months. If your blog’s rank is, say 305,316, this indicates that there are 305,315 blog ranks separating your blog from the #1 position.
The best way to increase your Technorati Authority is to write things that are interesting to other bloggers so they’ll link to you. Linking to source material when you blog is also a great way to engage in conversation and help others find what you find interesting.
Source: Technorati Support