Middle America Trench
subduction- Length
- 2800 km
- Max plausible
- M8.2
- Return period
- ~30–100 years for M8+ rupture per segment
Where the Cocos Plate subducts beneath the North American plate along Mexico's Pacific margin. Mexico's primary seismic hazard source, generating the largest and most damaging earthquakes — including the 1985 Michoacán and 2017 Chiapas events. Slips at approximately 6–7 cm/year. The Guerrero Gap segment has not ruptured in over a century and is closely monitored.
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