Magnitude 5.8 quake strikes Cagayan, epicenter 14 km NW of Calayan

A magnitude 5.8 earthquake struck Cagayan province at 1:45 p.m. on Sunday, with its epicenter located 14 kilometers northwest of Calayan and a depth of 10 kilometers, according to the Philippine Institute of Volcanology and Seismology (Phivolcs).

The tectonic quake registered an Instrumental Intensity III in Claveria, Cagayan, while Intensity II was recorded in Basco, Batanes; and Intensity I in Penablanca, Cagayan.

Phivolcs explained that the magnitude indicates the size and shaking caused by the earthquake, while instrumental intensity measures ground acceleration using an intensity meter based on reports from people who felt the quake.

The agency advised residents to stay alert and reminded them of the distinction between reported intensity, which is based on people's experiences, and instrumental intensity, which uses technical measurements.

Residents in affected areas were also warned to take precautionary measures as aftershocks are expected, although no damage has been reported so far.