Posted by bradfriedman

Hey Mozheads, Brad here! It’s a beautiful Friday here in Seattle, and I hope the day finds you well wherever you are.

We’ve got a May Mozscape index for you to check out! As always, the new data can be seen on Open Site Explorer, the Mozbar, your PRO campaigns, and the Mozscape API.

This is a very special release, you guys. This is the first Mozscape index that was processed by our virtual private cloud in Virginia! This is a big part of our long-term strategy to streamline our processing for maximum freshness and value. For now, some of our indexes will be from our Elastic Compute Cloud clusters and some will be from our VPC in Virginia while we figure out how best to use our resources.

Our histogram shows that the index was crawled from the second half of March through the first half of April.

And now, the juicy details — metrics for this latest index:

• 90,875,257,743 (91 billion) URLs
• 8,514,925,232 (8.5 billion) Subdomains
• 163,482,796 (163 million) Root Domains
• 917,461,264,950 (917 billion) Links
• Followed vs. Nofollowed
  • 2.15% of all links found were nofollowed
  • 56.4% of nofollowed links are internal
  • 43.6% are external
• Rel Canonical – 14.83% of all pages use a rel=canonical tag
• The average page has 76 links on it
  • 65.49 internal links on average
  • 10.95 external links on average

And here are the correlations with Google’s US search results:

• Page Authority – 0.36
• Domain Authority – 0.19
• MozRank – 0.24
• Linking Root Domains – 0.30
• Total Links – 0.25
• External Links – 0.29

Please feel free to leave your thoughts and comments! And check out a list of our previous index updates with metrics here.

Have a great weekend, everybody, and May the 4th be with you!

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