MANILA (UPDATE) - A magnitude 4.8 earthquake struck off Zambales on Monday night, Phivolcs said.
It was upgraded from its initial magnitude 4.3 measurement.
The tremor happened 23 kilometers southwest of Iba town at 7:20 p.m.
The quake was tectonic in origin and had a depth of 26 kilometers, according to Phivolcs.
Intensity IV was reported in Iba, Botolan, Cabangan and San Felipe towns in Zambales, while Intensity III was reported in Olongapo City, San Antonio, San Marcelino, San Narciso, Palauig and Subic, Zambales; and in Floridablanca, Pampanga.
Intensity II was reported in Candelaria, Masinloc and Santa Cruz, Zambales; Mabalacat City, Pampanga; Makati City; Malabon City; City of Manila; Quezon City, and Villasis, Pangasinan.
The following instrumental intensities were also recorded:
Intensity II - Guagua, Pampanga
Intensity I - Calumpit, Bulacan; Marikina City; Quezon City; San Jose City, Nueva Ecija; Dagupan City, Pangasinan
The tremor was not expected to cause damage nor aftershocks, Phivolcs said.