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the claim
Earthquakes are more frequent during full moons.
the verdict
CONTESTED PARTIAL
Recorded sources
1 source for · 1 against
Is it true that earthquakes are more frequent during full moons?
Partly. One peer-reviewed study reports enhanced earthquakes near Pacific shorelines during full and new moon phases, while the US Geological Survey notes that large earthquake catalogs show no significant correlation with tides, though a small tidal effect on some shallow faults is possible. Neither settles the general claim about full-moon frequency.
Verdict: CONTESTED PARTIAL · 1 source for, 1 against · Last checked
Evidence for · 1
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Gravitational Moon–Earth Forces Triggering Earthquakes in Subduction Zones. (n.d.). doi.org. https://doi.org/10.9734/jgeesi/2016/29227
Evidence against · 1
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Can the position of the moon or the planets affect seismicity? Are there more earthquakes in the morning/in the evening/at a certain time of the month? | U.S. Geological Survey. (n.d.). usgs.gov. https://www.usgs.gov/faqs/can-position-moon-or-planets-affect-seismicity-are-there-more-earthquakes-morningin-eveningat
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held for human review17 Oct 2026
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