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A minor magnitude 3.3 earthquake struck near GUERRERO, MEXICO on Tuesday, September 22, 2026 at 09:06:43 PM UTC. This shallow crustal event (13.3 km depth) released energy equivalent to approximately 1 tons of TNT. Here is the verified UNM telemetry, live epicenter map, and ground shaking assessment.
3.3M
Minor Seismic Class
13.3km
Crustal Layer
16.876° N, 99.598° W
GPS Coordinates
1 tons
TNT Equivalent Power
UNM
USGS Real-time Feed
A magnitude 3.3 event is classified as a minor earthquake. Often felt by people indoors, especially on upper floors. Hanging objects may swing slightly; structural damage is extremely rare.
Felt by almost no one except under extraordinarily favorable conditions.
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Earthquake strength is measured on a logarithmic scale. Compare this event with the full seismic scale:
Because seismic scales are logarithmic, each whole integer increase represents:
Southern and central Mexico lies directly above the Middle America Trench, where the oceanic Cocos and Rivera plates subduct beneath the North American Plate. This active subduction margin produces frequent intermediate and megathrust seismic events.
Originating at a depth of 13.3 km (Earth's Crust (0–70 km)), this rupture occurred occurred within the brittle upper crust. shallow earthquakes produce the highest peak ground acceleration and the sharpest surface shaking.
Micro-tremors and minor events of this scale are part of ongoing background tectonic relaxation. While isolated micro-aftershocks may occur, the likelihood of a damaging secondary event remains statistically low under normal seismic conditions.
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