[Updated June 8, 2026, 12:44 p.m.]

MANILA, Philippines — A magnitude 6.1 aftershock rocked the southern Philippines on Monday, the United States Geological Survey said, hours after a 7.8 earthquake killed at least one person, collapsed buildings and triggered regional tsunami warnings.

The second quake struck at a depth of 67 kilometers (42 miles) about eight kilometers north by northwest of Mindanao island’s Sarangani province, the USGS said.

READ: Phivolcs: Tsunami warning out in offshore M7.8 earthquake in Sarangani

On the other hand, the Philippine Institute of Volcanology and Seismology (Phivolcs) pegged the aftershock to  magnitude 6.7 at 8:55 a.m.

Due to the aftershock, the Phivolcs said up to Intensity III (weak) were reported in General Santos City, Davao City, Zamboanga City, and Surallah, South Cotabato.

Phivolcs issued a tsunami warning in nine provinces. /mr