M4.0 Earthquake 12 km SW of Sangay, Philippines — December 24, 2025
2025-12-24 21:05:15 UTC (2025-12-24) · approx. 5:05 AM UTC+8 local
On December 24, 2025 at 21:05 UTC, a magnitude 4.0 deep-focus earthquake struck 12 km SW of Sangay, Philippines, at a depth of 529.9 km and coordinates 6.3659°, 123.9582°.
Physical scale: An earthquake of magnitude 4.0 releases seismic energy equivalent to roughly 15 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 347 m — a useful intuition for the size of the slip patch on the fault.
This earthquake is part of an ongoing aftershock sequence following the magnitude 5.0 mainshock that occurred 10 days ago 38 km WSW of Palimbang, Philippines. Since the mainshock, the USGS has recorded 0 aftershocks in this area. Aftershock activity is expected to continue for days to weeks as stresses on surrounding faults redistribute.
Earthquake Details
123.9582°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.0 earthquake near Sangay, Philippines?
The magnitude 4.0 earthquake that struck 12 km SW of Sangay, Philippines on December 24, 2025 at 21:05 UTC had a depth of 529.9 km. For context, this was a light earthquake commonly felt near the epicenter.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.0 earthquakes can continue for several days and gradually diminish over time.
Is this the same earthquake as the M5.0 one earlier?
No. This magnitude 4.0 earthquake is an aftershock of the larger magnitude 5.0 mainshock that occurred earlier 38 km WSW of Palimbang, Philippines. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
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Understanding This Data
Magnitude 4.0 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000rklx). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, December 24, 2025). M4.0 Earthquake 12 km SW of Sangay, Philippines — December 24, 2025. Retrieved April 1, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000rklx/