A magnitude 4.0 earthquake shook the province of Isabela on Friday morning, according to Philippine Institute of Volcanology and Seismology (Phivolcs).
In its bulletin, Phivolcs said magnitude 4.0 quake occurred around 6:06 a.m. with its epicenter traced 15 kilometers southeast of San Guillermo in Isabela.
It added that Intensity 2 was felt at Ilagan, Isabela.
The quake which was tectonic in origin, had a depth of 29 kilometers.
Phivolcs said no damage was reported from the earthquake since it happened offshore.
It added that no aftershocks were expected from the said quake.
Phivolcs said an average of 20 earthquakes hit the country since the Philippines lies on the Pacific Ring of Fire, where earthquakes and volcanic eruptions are frequent due to friction between shifting tectonic plates.