M4.9 Earthquake 15 km NNE of Alugan, Philippines — April 28, 2026
2026-04-28 22:58:22 UTC (1 hour ago) · approx. 6:58 AM UTC+8 local
On April 28, 2026 at 22:58 UTC, a magnitude 4.9 shallow crustal earthquake struck 15 km NNE of Alugan, Philippines, at a depth of 35.0 km and coordinates 12.3502°, 125.5388°. This earthquake was detected by 44 seismic stations with good location accuracy and was assigned a USGS significance rating of 369, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.9 releases seismic energy equivalent to roughly 338 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.4 km — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Philippines, a region characterized by the Manila Trench and Philippine Trench subduction systems, where the Philippine Sea Plate overrides the Eurasian Plate. The nearest mapped fault system is the Philippine Fault. View all earthquakes in Philippines.
Learn more: Magnitude scale · Aftershock sequences
Earthquake Details
125.5388°E
Technical Information
Common Questions
How strong was the magnitude 4.9 earthquake near Alugan, Philippines?
The magnitude 4.9 earthquake that struck 15 km NNE of Alugan, Philippines on April 28, 2026 at 22:58 UTC had a depth of 35.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 12.3502°, 125.5388°, which is 15 km NNE of Alugan, Philippines. View all earthquakes in Philippines.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.9 earthquakes can continue for several days and gradually diminish over time.
Has Philippines had earthquakes this big before?
The largest recorded earthquake in Philippines was the M8.0 Mindanao earthquake of August 17, 1976. Today's magnitude 4.9 event is significantly smaller than that historical record.
What should I do after an earthquake?
If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.
Authoritative source: USGS event page (event ID: us7000sgt9). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, April 28, 2026). M4.9 Earthquake 15 km NNE of Alugan, Philippines — April 28, 2026. Retrieved April 29, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000sgt9/