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A minor magnitude 3.1 earthquake struck near ANTOFAGASTA, CHILE on Wednesday, September 2, 2026 at 11:39:27 AM UTC. This intermediate focal depth (110.1 km depth) released energy equivalent to approximately 674 kg of TNT. Here is the verified CSN telemetry, live epicenter map, and ground shaking assessment.
3.1ML
Minor Seismic Class
110.1km
Upper Mantle
22.880° S, 68.710° W
GPS Coordinates
674 kg
TNT Equivalent Power
CSN
USGS Real-time Feed
A magnitude 3.1 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:
This event occurred along the Peru-Chile (Andean) Subduction Zone, where the dense oceanic Nazca Plate slides eastward and plunges underneath the continental South American Plate at roughly 6 to 8 centimeters per year. This megathrust boundary is one of the most seismically active fault zones on Earth.
Originating at a depth of 110.1 km (Upper Mantle / Wadati-Benioff Zone (70–300 km)), this rupture occurred originated within the descending oceanic plate inside the upper mantle. shaking radiates over a wider geographic area with attenuated high frequencies.
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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