I have noticed a decrease in MozRank and to a much lessor extent Moz Page Authority on many of my sites very recently. I don’t know if it is some major MozRank update (I don’t see other posts about it, so probably not) or is just related to my sites. I don’t follow that closely but on the sites I visit a lot I noticed a decrease today (which doesn’t necessarily mean it happened today).
My sites that I visit a lot are blogs and are interrelated so I could imagine a change could cascade through all of them.
They are still doing well so I am not worried but it is always nicer to see increases than decreases.
Looking at a couple it seems like MozRank went down most, and Moz PA went down slightly if at all. Examples (I am trying to remember the previous rankings so I might be off by a bit – they don’t normally change much so I haven’t bothered tracking more than about twice a year)
[my memory of recent values to today (and August 2014 values)
site 1 from 64 and 6.3 to 64 and 5.6 (August 2014 values: 52 and 6.0)
site 2 from 60 and 6.2 to 58 and 5.3 (59 and 6.0)
site 3 from 63 and 6.2 to 59 and 5.2 (48 and 6.1)
site 4 from 58 and 6.1 to 55 and 5.2 (55 and 6.1)
site 5 from 51 and 5.6 to 50 and 5.0 (39 and 5.8)
site 6 from 51 and 5.5 to 47 and 5.0 (38 and 5.5)
site 7 I can’t remember to 37 and 4.9 (37 and 5.5)
site 8 I can’t remember to 33 and 4.9 (34 and 5.7)
site 9 from 38 and 4.9 to 36 and 4.3 (new)
As you can see many sites increased from August (gradually over the months) and then gave some of those gains back in the last day or two (or decreased to below August 2014, especially for MozRank). On average since August, 2014 PA increase then gave a bit of the increase back but was higher than August, 2014 while MozRank increased more then gave even more than the gain back to end up lower than August, 2014.
This site isn’t very connected to the others. This blog was 31 Moz Page Authority and 5.0 MozRank in August 2014, today it is MozPA 31 and 4.4 MozRank. The main Multi-pagerank site had MozPA of 41 and MozRank of 4.9 in August, 2014. Now the main site is 40 and 4.9. I think maybe these values didn’t change today but I can’t really remember. For the other sites they pretty much stayed in the same area since August, 2014.