MANILA—A magnitude 4.1 earthquake struck off Zamboanga del Sur on Monday, Phivolcs said.
The tremor happened at 8:48 a.m., 32 kilometers southeast of Tabina town. It was tectonic in origin and had a depth of 14 kilometers, according to Phivolcs.
Intensity II was felt in Cotabato City. The tremor was not expected to cause damage and aftershocks.