A magnitude-5.1 earthquake jolted Tawi-Tawi province on Tuesday morning, according to the Philippine Institute of Volcanology and Seismology (Phivolcs).
In its bulletin, the agency said the tremor occurred at 8:26 a.m. with its epicenter traced 51 kilometers southeast of South Ubian in Tawi-Tawi.
The town of Bongao, Tawi-tawi felt the quake at Intensity 3.
Phivolcs described an Intensity 3 earthquake as weak, but it is felt by many people indoors, especially those in upper floors of buildings.
The agency added that Intensity 1 was felt at Zamboanga City.
Phivolcs said the temblor, which was tectonic in origin, had a shallow of depth 72 kilometers.
Despite the reported intensity, the agency said that there was no casualty nor damage reported from the quake.
The agency however said that aftershocks are expected at the affected areas.
The Philippines lies on the Pacific Ring of Fire, where 20 to 25 earthquakes per day — mostly imperceptible — are common. PNA