M 3.1 - 2 km SW of Hato Candal, Puerto Rico
A magnitude 3.1 earthquake struck near 2 km SW of Hato Candal, Puerto Rico on Monday, August 31, 2026. This minor seismic event occurred at a focal depth of 128.4 km (intermediate focal depth), verified by PR real-time seismic telemetry.
(2 km SW of)Seismic Telemetry Specifications
3.1MD
Minor Seismic Class
128.4km
Upper Mantle
18.360° N, 65.802° W
GPS Coordinates
722 kg
TNT Equivalent Power
PR
USGS Real-time Feed
Epicenter Location & Tectonic Fault Map
Is This Earthquake Dangerous?
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.
Estimated Shaking Radius
~25–50 km
Potential Damage Zone
None
Focal Depth Effect
Moderate Damping
What Does Magnitude 3.1 Mean?
Earthquake strength is measured on a logarithmic scale. Compare this event with the full seismic scale:
Logarithmic Energy Multiplier
Because seismic scales are logarithmic, each whole integer increase represents:
10× Ground Motion Amplitude
The seismograph wave amplitude jumps by tenfold for every 1.0 magnitude step.
~31.6× Radiated Kinetic Energy
Total energy release increases exponentially (101.5 ≈ 31.62 times per magnitude unit).
Why Did This Earthquake Happen?
Earthquakes occur when elastic stress built up along tectonic plate boundaries, regional fault lines, or crustal fractures suddenly exceeds the friction holding the rock masses together. When the fault slips, accumulated energy radiates outward in all directions as high-velocity seismic waves.
Originating at a depth of 128.4 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.
Earthquake Safety Action Plan
- •Drop, Cover, and Hold On: Take cover beneath a sturdy table or desk.
- •Stay indoors away from exterior glass windows and heavy unanchored fixtures.
- •If outdoors, move into an open area away from power lines and building facades.
- •Inspect utilities for damaged gas lines, water leaks, or electrical hazards.
- •Expect Aftershocks: Secondary tremors frequently strike after moderate and strong events.
- •Avoid damaged structures and listen to official emergency broadcasts.
- •Maintain a 72-hour emergency go-bag with water, non-perishable food, and first aid.
- •Anchor heavy furniture, water heaters, and appliances to structural wall studs.
- •Establish a family emergency communication protocol and meeting point.
Did You Feel This Earthquake?
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