MozCast Shows Huge Google Update But SEOs Don't Agree

Jun 27, 2013 • 8:45 am | comments (53) by twitter Google+ | Filed Under Google PageRank & Algorithm Updates

Mozcast Google UpdateYesterday, MozCast, Moz's Google ranking volatility tool, reported the highest level of change in Google's search results in the history of MozCast. 113 degrees hot. Typically, on a normal day it will be in the high 60s or low 70s.

Why the huge temperature? The other tools such as and SERP Metrics reported normal days for Tuesday. And more importantly, I didn't see any chatter in the SEO forums that would signal a Google search algorithm or ranking update.

What set off MozCast? Dr. Pete explained what it might have been, giving a detailed look at the data but saying, he needs more time to give a definitive answer and even then, he might not know for sure.

One thing is for sure, I am 99% certain there was no major ranking change yesterday. The forums and level of discussion in those forums did not spike at all. In fact, it seemed like an incredibly slow day over the past 48 hours.

Heck, even the threads talking about the MozCast numbers have dozens of webmasters saying they didn't see any ranking changes. In fact, I don't see anyone claiming they see a negative or positive change in their rankings (outside of the normal site penalties or bugs causing deindexing) in the forums.

The threads talking about the MozCast numbers include Google+, BlackHatForums and the ongoing WebmasterWorld.

I should note, we did suspect an update on June 19th and Matt Cutts did say there is a multi-week update rolling out now.

But again, the SEO space is very quiet now about ranking changes in Google. Maybe Google is playing with MozCast? ;-)

Did you see any changes in the past 48 hours or so with your rankings in Google.

Forum discussion at Google+, BlackHatForums and WebmasterWorld.

Update: Friday Moz is showing 120 degrees. Not sure what is up:

mozcast 120

Previous story: Google's Cutts: Dropping ~ Operator Gives Us More Space To Index More Pages


David Zimmerman

06/27/2013 12:59 pm

To be honest, I think we're seeing the limitations of moz's algorithm. They didn't even detect Penguin 2.0. That's why I started looking at a different service:

Michael Martinez

06/27/2013 01:33 pm

I see significant churn in a number of brand-related queries. The SERP changes might not hurt traffic to the brands but might help smaller, off-brand sites.

Sanjeev Singh

06/27/2013 01:59 pm

Yesterday... I have seen a lot of traffic change in my given sites. See pics. - 65% increment - 57% increment - 56% increment

Stephanie Jerome

06/27/2013 02:11 pm

This massive fluctuation might be something to do with the fact the Google search results now stop at page 20, 30, 40 even for phrases that apparently have millions of hits.

Dr. Pete

06/27/2013 02:25 pm

I try to be very honest about the limitations of the system, but I'd argue that the Penguin 2.0 impact simply wasn't very big. That seems to have been the consensus across multiple tools and industry experts. One of the reasons I decided to build MozCast was that we're over-reliant on Google giving things names. As soon as they name an update, we assume it's "big". The data suggests that's frequently not the case. There are over 500 updates per year (directly from Google's mouth in sworn testimony), and very, very few get names.


06/27/2013 02:34 pm

i have noticed a little increase in my traffic on my site


06/27/2013 02:35 pm

My site has also seen an increase in visitors over the last 48 hours. Tuesday was up 8% from normal but Wednesday there was a roughly 18.4% increase in visitors from normal (15.5% up from the Tuesday). My visitor count is usually quite stable, varying only a few percent per day, but you can see the obvious ramp up for this and I have no other explanation at the moment.


06/27/2013 04:23 pm

I saw significant changes in the serps and a pretty significant bump in traffic to my site.

the koon

06/27/2013 04:35 pm

it was huge if you were in the uk payday loan sector...

Graham Ginsberg

06/27/2013 04:56 pm

Massive fluctuations or mere flatulations?


06/27/2013 05:36 pm

Loving the emphasised chatter

Holly Ritchie

06/27/2013 05:43 pm

Carousel rolled out on June 19th. Maybe that had something to do with it?


06/27/2013 06:06 pm

It shows on overview. This spike show up again on organic?

Barry Schwartz

06/27/2013 06:22 pm

glad you picked it up. :)

Mark Warner

06/27/2013 06:24 pm

But just the once .. we need more lol

Durant Imboden

06/27/2013 07:30 pm

I haven't yet noticed any significant change in visits or visitors, but pageviews are down noticeably. Usually any changes in visits, visitors, and pageviews are pretty much in synch. (Informational travel-planning site, at same domain since 2001.)


06/27/2013 08:03 pm

Ditto. Traffic on my site peaks early in the week and tapers off as the week comes to an end. However, there has been no tapering yet this week; in fact, traffic is up 7% over the last 48 hours. Traffic being up 7% is what actually prompted to me to search for reasons why, which led me to this article.

Tanner Petroff

06/27/2013 09:20 pm

I'm with Dr. Pete on this one - I saw nearly zero noticeable fluctuation across ~50 sites with Penguin 2.0. Still not sure about Tuesday's update, as I haven't seen much difference on that, either. I saw some pretty big fluctuations from high temps we saw around this same time last year, though.


06/27/2013 11:37 pm

There seemed to be less collateral damage with Penguin 2.0. Hopefully Google was, and will continue to be, more careful about hitting innocent sites. I have seen unusual changes in the SERPS over the past few days in my particular niche. Unusual amount of Domain Crowding with Authority sites. Lots of flip-flopping in SERPS which are usually set in stone.

DeWayne Reeves

06/28/2013 12:44 am

For our main keyword I am now seeing 2 Wikipedia entries, 2 investopedia entries and 2 CME entries. As a result we were knocked down 3 spots.

DeWayne Reeves

06/28/2013 02:51 am

Beware of this link guys.


06/28/2013 03:55 am

I received a 20% surge in my website. Although, it is relatively new (crawl-able 2 months ago).

Allena Abas

06/28/2013 05:08 am

seeing some keywords down today but not on tuesday! as mozcast is showing a hot one on tuesday.

Alan Smith

06/28/2013 05:40 am

Some keywords of mine are little bit down.

Soni Sharma

06/28/2013 09:03 am

I have noticed ranking fluctuations and Rich Snippets changes. @Barry - For some SERPs my pic is also not coming in search pages... I think Google is also considering my Pic Ugly too.

anil kumar pandey

06/28/2013 10:07 am

I also observe that for some queries no. of SERP Results are changing when u drill down.


06/28/2013 11:46 am

Seeing ranking changes ... seems large sites are again moving up. Wikipedia has gotten a bump on many queries. Just a bit of mess today.

Kenny Shafer

06/28/2013 12:37 pm

My two cents...I'm seeing a lot of geo-related queries affected. It looks, and once again this is one person's experience, like Google has put a great emphasis on that package of local results in the real estate and job/employment verticals. Where once sites were in the top couple of results, they are pushed down underneath the local package...with maybe one or two big names above that pack. The number of organic links above that local pack seems to vary depending on the size of the market/city (although this could be due to a lack of available "local" results in those smaller cities) Rankings for these queries in Bing/Yahoo are unchanged. Good luck folks!

Faizaan Khan

06/28/2013 01:34 pm

I see another Huge update on Mozcast :P 120 :D


06/28/2013 01:41 pm

Definitely something going on. A lot of movement in the serp.

Seo Hop

06/28/2013 02:07 pm

anyone think mozcast may be to sensitive? Seo Google Update Tools Sensitivity Mozcast, Serps, Serpmetrics Take a vote

Durant Imboden

06/28/2013 02:17 pm

Google used to display my photo and authorship info next to my main site's search results fairly consistently, but it mostly disappeared a while back--except on our related blog, which is at a different domain. HOWEVER... In a recent search where I clicked the "similar pages" arrow below the #1 result, my photo, byline, etc. were shown normally on the "similar pages" SERP. It would be interesting to know if Google Authorship is linked in any way to Google Search updates (say, a quality score or something similar).

Paul Ryan

06/28/2013 02:38 pm

I saw significant changes for some keywords I am tracking. For one particular keyword, it's the biggest change in about 2 years.

Dr. Pete

06/28/2013 02:50 pm

One note - I've been comparing data with other tools. SERPMetrics generally tracks the top 100, whereas MozCast focuses on the top 10. If you look at just the top 10 data for SERPMetrics, there's been increasing volatility with spikes on 6/25 and 6/27, matching our data.


06/28/2013 03:57 pm

Check this plz mozcast shows 120 degree


06/28/2013 04:17 pm

Its all kicking off again on the [car insurance] market in the UK, last week we had Citadel, today we have


06/28/2013 05:27 pm

Wow - 120? Mozcast has been a bit trigger happy lately. Time to tone it down guys.

Graham Ginsberg

06/28/2013 05:28 pm

Google can chatter all it wants but it still has done nothing about penalizing websites that keyword stuff


06/28/2013 05:55 pm

yes i saw a heavy up and down in search results. it looks like a heavy heavy change in algo because of these search results.


06/28/2013 11:48 pm

Weird. I've seen plenty sites that got hit due to keyword stuffing, way more often than not, in fact.

Julia McCoy

06/29/2013 06:06 am

No changes here!


06/29/2013 09:50 am

does anyone know the exact differences in metrics mozcast uses versus serp metrics would be food for an interesting blog post


06/30/2013 06:25 am

All fluctution tools report the same and nobody have a clue about what's going on. Rank index also shows higher changes on the 28th:

Joe Boylan

07/01/2013 01:04 am

I saw significant improvements in some of my clients rankings starting a few days ago. Something big rolled out.


07/01/2013 04:11 am

I saw a huge change that affected one of my sites big time (from a homepage at #2 to a subpage on page 3) for half a day until reverting back. Many of the sites around mine were changing pretty wildly during all of this as well.


07/01/2013 05:46 am

My site has been improved...


07/01/2013 04:35 pm

My business site has suffered quite a bit from my most important keywords, down from #5 to #29-31, and has not recovered. I am still trying to digest what can improve it in short time and I am coming up with zero answers.


07/02/2013 09:55 am

One of my pages went from 26th into 2nd over night for a certain keyword. I thought there might have been an error when I got to work this morning! After reading this, it looks like this is genuine.


07/02/2013 11:47 pm

I had some decrease in visitors and rankings for two of my sites on the 27th.


07/03/2013 12:34 pm

Google Web understanding the merits of being top in natural results have always been keen in establishing techniques of getting on the top Google has settled a bit on following few factors apparently which would continue to govern SEO in 2013. pandalinkbuilders

Alexander Hemedinger

07/03/2013 03:04 pm

Changes helped with my SEO efforts. So hopefully these updates benefit the people doing white hat tactics further. :)


07/10/2013 04:51 am

From what I have noticed Google have gotten it badly wrong. I am seeing a lot of spammy pages, no content at all, lots of links in a sidebar a-la 2008 and they are on the first page!!! Spotted this today, I mean really Google WTF is this about on the first page of Google for 'condo bangkok'??? circlecondo dot com We are mostly SEO's on this forum, someone explain why that page is in the top 100, no onsite, no content, a mess!


10/06/2013 05:29 pm

This update may be related to the hummingbird. on June 27 my website traffic increased sharply, but then fell back as it was before June 27 on August 24, and from August 25 until now the decrease became even worse(my website traffic fell as it was before penguin 2.0 update)

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