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SERP Seismometer

Track SERP Volatility in Google with SERP Seismometer

SERP Seismometer measures SERP fluctuations for 10K+ domains and keywords that we monitor daily. We track both desktop and mobile SERP volatility over the past 30 and 90 days to allow you full SERP visibility. Check below what’s the risk for a SERP earthquake according to our Seismograph

Stable
GroundRisk Level: LowSep 18, 2026

Google Desktop SERP Volatility - Last 30 days average: 37

SERP Seismometer volatility score today is 31 (Sep 18) - Stable ground
The score has increased from 25 yesterday
The average score on our Richter scale for the last month was 38

Low
Normal
High
Very High

Google Mobile SERP Volatility - Last 30 days average: 37

SERP Seismograph volatility score today is 29 (Sep 18) - Stable ground
The score has increased from 24 yesterday
The average score on our Richter scale for the last month was 37

Google SERP Volatility - Last 90 days average: 43

SERP Seismometer volatility in the past 90 days was 43 - Stable ground
Month over month we can see the earthquake risk level has decreased from 44 to 37
On Desktop only, our volatility scale averaged on 43 in the past 90 days

Google Mobile SERP Volatility - Last 90 days average: 43

SERP Seismometer volatility in the past 90 days was 43 - Stable ground
On Mobile only, the earthquake risk level has decreased month over month from 45 to 37

How does SERP Seismometer help me?

Similarweb’s SERP Seismometer Tool identifies and analyzes the ranking patterns of Google algorithm changes, in order to help you avoid ranking earthquakes. Every year Google launches many updates and although you'll see lots of buzz online about the big ones like Broad Core Updates and Product Review updates, but the smaller updates can also leave your rankings in a constant state of fluctuation.

So how can you tell if there’s an earthquake coming or if you’re on steady ground?

We developed the SERP Seismometer to provide you with comprehensive daily monitoring of ranking fluctuations and Google algorithm changes so you don't have to wait for the press to tell you that an update is rolling out.

Reading the Graphs

The numbers displayed on the SERP Seismometer graphs represent the change in rankings on a particular date; the higher the Risk Scale, the more Google's rankings have fluctuated. For example: yesterday's volatility level was 25 and today it’s 31 - so we see it has increased, and take action if needed.

The colors indicate the level of “earthquake risk” to search engine rankings - when you see orange, we think you should check your rankings and take precautionary measures; red means there’s an earthquake coming, and it's time to check your website's traffic and take more serious action to protect your rankings.

On our page you can see:

Today's earthquake risk level is Stable ground
The average risk level this month was Stable ground
The average risk level in the past 90 days was Stable ground
The average risk level has decrease month over month

Track your SERP ranking daily

Make sure you're ready for an earthquake by tracking the ranking of your keywords and topics in Similarweb Rank Tracker. Don't let ranking fluctuations surprise you, instead get ready with keyword and tag tracking, as well as competitor tracking, to be able to spot and analyze any changes in your own ranking - And act upon them