Why did Domain Authority go up so much? Did you change your measurement?

[rickt007]

Our Domain Authority has been at 42 or 43 for a couple months and it just increased to 54.  Why did this happen?

I would like to think that it is because of out SEO and linkbuilding work.  However, I suspect something else may be involved because the 3 competitors we track also all increased between 10 to 25 points at the same time.

What happened?  Did you make changes in the way you score DA or is this the result of changes in what pages you crawl?  Or what?

[eunaneunan]

answer is in this link

http://www.seomoz.org/blog/2nd-november-index-update-our-broadest-index-yet-and-new-pada-scores-are-live

[KeriMorgret]

Yes, SEOmoz did change the way they calculate DA and PA. That blog post (and the other referenced in it) give a lot of the background information that'll help explain things for you.

For this update and future updates, I'm going to have a Q&A discussion question that also alerts people to these types of changes, as I know not everyone has a chance to read the blog for those notices.