EXPLAINER: Mindanao Earthquake -- Why is PHIVOLCS studying the Cotabato Trench?

A powerful seismic event struck a vast area of Mindanao on the morning of June 8, 2026, coinciding with the first day of the academic year. The unexpected tremor caused widespread panic among students and local residents as they evacuated school buildings. In response to the incident, the Philippine Institute of Volcanology and Seismology (PHIVOLCS) has launched an investigation into the Cotabato Trench. Experts are currently analyzing the geological structure to determine if this specific fault line triggered the earthquake. This research is part of a broader effort to better understand the region's complex tectonic activity and improve future disaster preparedness.

Investigating the Cotabato Trench is essential for assessing the seismic risks posed to Mindanao and enhancing the accuracy of earthquake hazard warnings for the region.