Magnitude 4.6 quake jolts Marcos, Ilocos Norte early Saturday, Dec. 6, 2025. (Photo: Phivolcs/Facebook)
A magnitude 4.6 earthquake struck Ilocos Norte early Saturday, according to the Philippine Institute of Volcanology and Seismology (Phivolcs).
The quake hit at 3:37 a.m. with its epicenter located west of Marcos town. It was tectonic in origin and measured at a shallow depth of 4 kilometers.
It was initially reported at magnitude 4.5 at a depth of 10 km.
Phivolcs said Intensity IV was felt in Pinili and Marcos, Ilocos Norte.
Instrumental intensities were recorded in the following areas:
- Intensity IV: Batac City, Ilocos Norte
- Intensity III: Laoag City, San Nicolas, Solsona (Ilocos Norte)
- Intensity II: Sinait, Ilocos Sur
Phivolcs said no aftershocks or damage were expected from the tremor.