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A minor magnitude 3.0 earthquake struck near EASTERN HONSHU, JAPAN on Sunday, August 30, 2026 at 02:11:30 AM UTC. This shallow crustal event (10.0 km depth) released energy equivalent to approximately 477 kg of TNT. Here is the verified JMA telemetry, live epicenter map, and ground shaking assessment.
3.0M
Minor Seismic Class
10.0km
Crustal Layer
37.200° N, 139.300° E
GPS Coordinates
477 kg
TNT Equivalent Power
JMA
USGS Real-time Feed
A magnitude 3.0 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.
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:
Japan sits at the complex collision intersection of four major tectonic plates: the Pacific, Philippine Sea, Eurasian, and North American plates. Subduction of the Pacific Plate beneath the Japanese archipelago creates intense strain that releases as high-frequency megathrust earthquakes and volcanic activity along the Pacific Ring of Fire.
Originating at a depth of 10.0 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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