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Explore the blog →A daily measure of how much Google rankings are moving, computed from real position data across live websites — not scraped SERPs. When the index spikes, an algorithm update is usually rolling.
Latest data: July 13, 2026 — Search Console position data lags 2-3 days.
50,000 keyword movements sampled across 111 websites.
Most recent full-sample day: July 13, 2026
| Industry | Volatility | Mean rank change | Keywords |
|---|---|---|---|
| Entertainment | 10.61 | 4.70 | 249 |
| Healthcare | 10.47 | 4.42 | 17336 |
| Real Estate | 7.84 | 3.31 | 2298 |
| Lifestyle | 7.34 | 3.24 | 276 |
| Ecommerce | 7.17 | 3.21 | 8358 |
| Digital Marketing | 7.00 | 2.93 | 6168 |
| Technology | 6.86 | 3.09 | 6121 |
| Business Services | 6.05 | 2.56 | 6746 |
| Media Publishing | 4.77 | 3.19 | 63 |
| Education | 4.45 | 1.89 | 1629 |
| Finance | 4.22 | 1.95 | 252 |
| Sustainability | 3.50 | 1.44 | 504 |
Every day our spike detector flagged — line these up against confirmed Google updates.
SERP volatility measures how much Google's results pages are changing over a period. Calm days mean rankings mostly hold; volatile days mean many pages are gaining or losing positions at once — the classic fingerprint of an algorithm update rolling out. Tracking volatility separates "Google moved" from "my site broke", which changes what you should do next.
Every day we compare Google Search Console positions for tens of thousands of tracked keywords against their previous positions. Movement near the top of page one is weighted more heavily — a shift from position 3 to 8 matters more than 83 to 88.
The spread of all those weighted position changes becomes the day's raw volatility score. We then rank it against the trailing year of full-sample days, so the 0-10 index tells you how unusual today's turbulence is — an 8+ reading shows up only a few percent of days.
When a day's volatility jumps past the 95th percentile of the trailing month or rises 30%+ day-over-day, we flag it as a spike. When the late-June 2026 turbulence hit, our index confirmed with real ranking data what same-day scrapers could only estimate.
Since Aug. 21, 2024: 467 daily readings. Over the last year we averaged 50,000 keyword movements across 104 websites per day.
Most volatility sensors re-scrape a fixed keyword basket and infer movement. This index is computed from actual Google Search Console position data across live websites in every industry we track — the movement is what real sites experienced.
The index runs unbroken since August 2024. You can line up past spikes against confirmed Google updates and see exactly how turbulent any past week was — most tools only show you the last 30 days.
A core update rarely hits every vertical equally. The industry table shows which sectors are moving most right now, so you can tell whether the turbulence you feel is market-wide or specific to your niche.
Search Console position data lags a couple of days, and we say so — the page always shows the exact date of the latest reading instead of pretending to be a same-day seismograph.
SERP volatility measures how much search engine results pages are changing over a period. High volatility means many pages are gaining or losing positions at once, which usually signals a Google algorithm update, an infrastructure change, or unstable ranking signals in a niche.
Those tools re-scrape a fixed basket of keywords and measure how the results differ day to day. Our index is computed from real Google Search Console position data across live websites — it measures the ranking movement actual sites experienced, weighted toward top positions, with an unbroken daily history since August 2024.
A spike means rankings moved unusually hard that day across our sample. If your traffic shifted on a spike day, the cause is more likely an algorithm update than something you changed. Check the industry table to see whether your vertical was among the most affected before making changes.
Google Search Console reports positions with a delay of roughly two to three days, and we would rather show verified position data late than estimated data on time. The date under the gauge is always the exact day of the latest reading.
We take the day's raw volatility (the spread of position-weighted rank changes) and rank it against the trailing year of full-sample days. The percentile maps to 0-10 so that readings above 8 are genuinely rare — under 5% of days — rather than a fifth of the calendar.
Weekends and holidays produce fewer fresh position reports, so some days are computed from a smaller slice of sites and industries. Those days are dimmed on the chart and excluded from the baseline that the 0-10 score is ranked against.
SEOJuice tracks your pages' positions daily and tells you which changes were the algorithm and which were you.