This page summarizes earthquakes in Ilocos Sur (Philippines). The most recently recorded event was a magnitude M3.4 earthquake near Ilocos Sur on 2026-08-30 17:42:06 UTC. All event lists and map markers are limited to the last 30 days.
In 2026, Ilocos Sur recorded 5 earthquakes within Philippines. The strongest event reached M3.4.
Located on the Philippine Sea Plate.
