M3.1 Earthquake – Indonesia

Published: 27 days ago•Sunday, September 27, 2026 at 2:56 AM UTC

A minor magnitude 3.1 earthquake struck near Indonesia at a shallow crustal depth of 10.0 km, releasing seismic energy equivalent to approximately 674 kg of TNT. Here is the verified BMKG telemetry, interactive epicenter map, and ground shaking assessment.

3.1MAG
Minor EarthquakeShallow Crustal Event
IndonesiaIndonesia

Seismic Telemetry Specifications

Magnitude

3.1M

Minor Seismic Class

Focal Depth

10.0km

Crustal Layer

Epicenter

9.520° S, 124.600° E

GPS Coordinates

Energy Yield

674 kg

TNT Equivalent Power

Network Source

BMKG

USGS Real-time Feed

Epicenter Location & Tectonic Fault Map

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USGS Source

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 ZoneNone
Focal Depth EffectHigh Surface Energy (Crustal)

Estimated Shaking Across Nearby Communities

Maliana• 89.9 km (55.9 mi) NE

Felt by almost no one except under extraordinarily favorable conditions.

MMI I • Imperceptible
Dili• 151.2 km (94 mi) NE

Felt by almost no one except under extraordinarily favorable conditions.

MMI I • Imperceptible
Baucau• 235 km (146 mi) ENE

Felt by almost no one except under extraordinarily favorable conditions.

MMI I • Imperceptible

Did You Feel This Earthquake?

Help seismologists and community members map real-world ground shaking near Indonesia.

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Your immediate response verifies shaking boundaries and helps ground-truth instrumental models.

What Does Magnitude 3.1 Mean?

Earthquake strength is measured on a logarithmic scale. Compare this event with the full seismic scale:

1.0 – 2.9Micro
3.0 – 3.9Minor
This Event
4.0 – 4.9Light
5.0 – 5.9Moderate
6.0 – 6.9Strong
7.0 – 7.9Major
8.0+Great

Logarithmic Energy Multiplier

Because seismic scales are logarithmic, each whole integer increase represents:

10× Ground Motion Amplitude
The seismograph wave amplitude jumps tenfold for every 1.0 magnitude step.
~31.6× Radiated Kinetic Energy
Total energy release multiplies exponentially (101.5 ≈ 31.62 times per unit).

Why Did This Earthquake Happen?

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 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.

Aftershock Outlook & Secondary Tremors

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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Earthquake Safety Action Plan

Complete Safety Guide →
During the Shaking
  • •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.
Immediately After
  • •Inspect utilities for damaged gas lines, water leaks, or electrical hazards.
  • •Expect Aftershocks: Secondary tremors frequently strike after significant events.
  • •Avoid damaged structures and listen to official emergency broadcasts.
Preparation & Kits
  • •Maintain a 72-hour emergency go-bag with water, food, and first aid.
  • •Anchor heavy furniture, water heaters, and appliances to structural studs.
  • •Establish a family emergency communication protocol and meeting point.

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