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Atmospheric CO₂ (Mauna Loa) vs Worldwide Strong Earthquakes (M6+)

Atmospheric CO₂ (Mauna Loa) and Worldwide Strong Earthquakes (M6+) correlate at r = +0.33 over 66 years (1960–2025), p = 0.0066. With the time trend removed, r = -0.28. Holds up after detrending.

Verdict: Holds up after detrending. Statistically significant (p = 0.0066) and the association survives trend removal (detrended r = -0.28). Correlation still isn't causation, but this one isn't an obvious artifact.

Pearson r
+0.33
p-value
0.0066
Years compared (n)
66 (1960–2025)
95% confidence interval
0.10 to 0.53
Correlation with the time trend removed
-0.28

Sources

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Correlation does not imply causation. How the verdict is worked out.