A magnitude 4.9 earthquake struck Indonesia at 19:33 UTC on Friday, June 12, 2026, according to data from the United States Geological Survey (USGS). The earthquake's epicentre was located 138 km N of Tobelo, Indonesia, at a focal depth of 100.3 km.
Event Details
With a focal depth of 100.3 km, this earthquake falls into the intermediate depth category (70–300 km). At this depth, seismic waves travel further before reaching the surface, spreading energy over a wider area. While shaking intensity at the epicentre is somewhat reduced compared to a shallow event of equal magnitude, an intermediate earthquake can be felt across a much larger region.
The earthquake registered a magnitude of 4.9 on the moment magnitude scale — the standard measurement used by seismologists worldwide. At this magnitude, the shaking is felt strongly by everyone; minor to moderate damage possible in vulnerable buildings.
Where Did This Earthquake Occur?
Indonesia is located on the Pacific Ring of Fire at the junction of multiple major tectonic plates, including the Indo-Australian, Eurasian, and Pacific plates. With over 17,000 islands along active fault lines and subduction zones, it is among the world's most earthquake-prone nations.
Indonesia experiences thousands of earthquakes each year. Major events in recent decades include the 2004 Indian Ocean earthquake and tsunami (M9.1–9.3), the 2006 Yogyakarta earthquake, and the 2018 Sulawesi earthquake and tsunami. The country has invested heavily in tsunami warning infrastructure since 2004.
What Does Magnitude 4.9 Mean?
Moderate earthquakes are felt by virtually everyone near the epicentre. Strong shaking lasting 10–30 seconds can topple unsecured items, crack plaster, and cause poorly anchored objects to fall. Aftershocks are common following moderate events.
Significant damage can occur to vulnerable structures — particularly unreinforced masonry, old adobe buildings, and poorly maintained older construction. Well-engineered modern buildings are designed to withstand this level of shaking with minimal structural impact, though contents may shift and non-structural elements (ceilings, partitions) can be damaged.
A magnitude 4.9 earthquake releases approximately approximately 30,000 tonnes of TNT — comparable to the Hiroshima atomic bomb of energy. For comparison, this exceeds the energy released by most conventional explosive events and is sufficient to shift tectonic stress in measurable ways across a wide region.
Safety Guidance
During and after an earthquake, follow instructions from official civil protection, emergency services, and government authorities. Avoid spreading unverified information on social media. Official channels provide the most reliable information about aftershock risk, evacuation orders, and available assistance.
If you are on or near a coast and experience strong or prolonged earthquake shaking, treat it as a potential tsunami warning and move immediately to high ground. Do not wait for an official alert — natural warning signs (severe shaking, unusual sea withdrawal) are your first alert.
BMKG (Badan Meteorologi, Klimatologi, dan Geofisika) operates Indonesia's earthquake and tsunami warning system. Coastal communities should move to higher ground immediately after strong shaking without waiting for an official warning.
Monitoring and Aftershocks
Seismologists are continuing to monitor the region for aftershocks, which are common following earthquakes of this magnitude. Aftershocks can occur minutes, hours, or even days after the main event and are sometimes strong enough to cause additional damage to already-weakened structures. Residents in the area are advised to remain cautious and follow guidance from local authorities.
Real-time seismic data is being collected by the USGS and contributing regional networks. Updated information will be published as it becomes available. You can track this and all other global seismic activity in real time on our live earthquake map.
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