THE Philippine Institute of Volcanology and Seismology (Phivolcs) on Saturday reported that a magnitude-5.1 earthquake struck near Gigmoto, Catanduanes.

Earlier recorded as a 5.5 magnitude, the Phivolcs said the earthquake struck the area at 8:41 a.m. on Saturday.

The earthquake is tectonic in origin, with a 59-kilometer depth of focus.

Aftershocks were expected, but no damage was reported.

As of their latest bulletin, only intensity 1 was felt in Tabaco, Albay.