A magnitude 4.8 earthquake struck the Philippines at 17:05 UTC on Sunday, August 9, 2026, according to data from the United States Geological Survey (USGS). The earthquake's epicentre was located 7 km ESE of Mabini, Philippines, at a focal depth of 110.6 km.
Event Details
With a focal depth of 110.6 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 4.8 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?
The Philippines archipelago sits at the meeting point of the Philippine Sea Plate, Eurasian Plate, and several smaller microplates. It lies squarely within the Pacific Ring of Fire and experiences some of the world's most intense seismic activity.
The Philippines has experienced numerous major earthquakes, including the 1990 Luzon earthquake (M7.8) and the 2019 Cotabato earthquakes. Metro Manila, built partly on soft lacustrine sediments of Laguna de Bay, is considered at significant risk in the event of a major Marikina Fault rupture.
What Does Magnitude 4.8 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 4.8 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
Agree on an out-of-area contact that family members can reach if local communications are disrupted. Identify two meeting points: one near your home and one further away. Practise earthquake drills, especially with children and elderly household members.
Understanding the type of building you live or work in is one of the most important steps in earthquake preparedness. Older unreinforced masonry buildings and soft-storey apartment buildings are significantly more vulnerable than modern reinforced concrete or steel-frame structures. If you have concerns, consult a structural engineer.
PHIVOLCS (Philippine Institute of Volcanology and Seismology) monitors seismic activity and issues alerts. Residents should familiarise themselves with local contingency plans and safe building evacuation routes.
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.
Aftershock Probability
After any significant earthquake, the probability of aftershocks follows a well-understood statistical pattern known as the Omori-Utsu Law: aftershock frequency decays roughly as the inverse of elapsed time since the main shock. For a magnitude 4.8 event, there is a meaningful probability of one or more felt aftershocks in the days following the main event. The USGS publishes real-time aftershock forecasts for significant earthquakes, which are updated as the sequence evolves.
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