Five minor earthquakes hit Laguna and Quezon provinces on Tuesday.
In a bulletin, the Philippine Institute of Volcanology and Seismology (Phivolcs) reported that a magnitude 3.2 tremor struck Alaminos, Laguna, at 12:34 p.m.
The epicenter of the tectonic tremor was located 3 kilometers northwest of the municipality at a depth of 5 km.
A tectonic earthquake is produced by sudden movement along faults and plate boundaries.
The quake was reported at Intensity III in San Pablo City, Laguna.
It was also logged at Instrumental Intensity II in Los Baños, San Pablo City, and Calamba City, Laguna; and Intensity I in Carmona, Cavite; and in Dolores, Quezon. Intensities are measured based on an earthquake’s damage to property and its effect on people, while instrumental intensities are measured by an intensity scale.
At 1:12 p.m., a magnitude 1.8 tectonic tremor was recorded in Los Baños.
The state seismologists said that the epicenter of the earthquake was located 6 km southeast of the municipality. It had a depth of focus of 33 km.
It was recorded at Instrumental Intensity I in San Pablo City.
Earlier, at 11:31 a.m., a magnitude 2 tectonic tremor was also detected in Los Baños.
The epicenter was located 6 km southwest of the locality with a depth of 33 km.
At 11:28 a.m., a magnitude 1.5 earthquake was also recorded in the same municipality.
According to Phivolcs, the epicenter of the tremor was located 4 km southwest of the town. It had a depth of focus of 32 km.
Phivolcs also reported that a magnitude 2.7 tectonic earthquake was felt in Lopez, Quezon, at 12:20 p.m.
The agency said that the epicenter of the tremor was located 13 km southeast of the locality with a depth of focus of 2 km.
Phivolcs said it does not expect any damage or aftershocks from the quakes.
Due to the earthquakes, the Office of the Chancellor at the University of the Philippines-Los Baños was forced to suspend classes.
‘In view of the recent earthquakes felt on campus today, classes and work in UPLB are suspended for the rest of the day (Tuesday, 28 October 2025). Take care and stay safe,’ the UPLB said in a post on its Facebook.
The students and faculty evacuated to an open field after a 1.8-magnitude earthquake hit the locality