Phivolcs said the tremor, which was tectonic in origin, happened around 6:10 a.m. some 17 kilometers (km) southeast of Dolores town, also in the province. It had a depth of focus of 17 km, it added.

A magnitude 5 earthquake struck Calatagan town in Batangas province on Tuesday afternoon, April 1, the Phivolcs reported. ... while instrumental intensities are measured by an intensity scale.