Technorati Authority is calculated based on a site’s linking behavior, categorization and other associated data over a short, finite period of time. A site’s authority may rapidly rise and fall depending on what the blogosphere is discussing at the moment, and how often a site produces content being referenced by other sites.
The new Authority calculation differs from the past version, which measured linking behavior over a longer 6 month timeframe. Links in blogrolls don’t count towards Authority.
Nextbigfuture is also 17th in the Green topic and is ranked 304th on overall authority.
Topical Authority measures a blog’s influence within its subject category.
Blogs will appear ranked by topical authority within Technorati’s blog directory.
Factors include linking behavior from blogs and posts in the same category, how well a blog’s overall content matches the category in question, and other associated data.