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A minor magnitude 3.4 earthquake struck near NORTHERN SUMATRA, INDONESIA on Tuesday, August 25, 2026 at 11:57:20 PM UTC. This intermediate focal depth (158.0 km depth) released energy equivalent to approximately 2 tons of TNT. Here is the verified BMKG telemetry, live epicenter map, and ground shaking assessment.
3.4M
Minor Seismic Class
158.0km
Upper Mantle
1.580° N, 99.520° E
GPS Coordinates
2 tons
TNT Equivalent Power
BMKG
USGS Real-time Feed
A magnitude 3.4 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 archipelago is situated along the Sunda and Philippine megathrust subduction zones within the Pacific Ring of Fire. The Indo-Australian Plate converges northeastward beneath the Eurasian and Sunda plates, producing massive tectonic friction, deep oceanic trenches, and widespread volcanic arcs.
Originating at a depth of 158.0 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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