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US Median Age vs Worldwide Major Earthquakes (M5+)
US Median Age and Worldwide Major Earthquakes (M5+) correlate at r = +0.65 over 64 years (1960–2023), p < 0.0001. With the time trend removed, r = -0.38. Direction flips without the trend.
Verdict: Direction flips without the trend. The raw correlation is 0.65, but once each series' time trend is removed it becomes -0.38. The year-to-year movements run the opposite way to the long-run trends, so the headline number is misleading.
- Pearson r
- +0.65
- p-value
- < 0.0001
- Years compared (n)
- 64 (1960–2023)
- 95% confidence interval
- 0.49 to 0.77
- Correlation with the time trend removed
- -0.38
Sources
- US Median Age (years): Our World in Data. US Median Age (Our World in Data: Median age).
- Worldwide Major Earthquakes (M5+) (earthquakes per year): USGS. Annual worldwide count of magnitude 5+ earthquakes (USGS ComCat).
Related pairs
- US Median Age vs US Adult Obesity (r = +0.99)
- US Median Age vs US Population (r = +0.98)
- Atmospheric CO₂ (Mauna Loa) vs US Median Age (r = +0.97)
- US Median Age vs US Internet Users (r = +0.97)
- US Internet Usage vs US Median Age (r = +0.97)
- US Median Age vs US GDP per Capita (r = +0.97)
Correlation does not imply causation. How the verdict is worked out.