Qualla: November 2023 Mindanao Earthquake

November 2023 Mindanao Earthquake: Introduction

Thu, 09 Apr 2026 00:00:00 GMT

Photo credit Mikenorton, CC BY-SA 3.0. At 4:14 in the afternoon on November 17, 2023, the ground beneath Sarangani province began to shake. Students were still in school. Shoppers were in malls. Fishermen were hauling in their afternoon catch. Within seconds, walls collapsed, landslides buried roads, and the sea receded ominously from the coast near Alabel. The magnitude 6.8 earthquake -- generated by the same Cotabato Trench that produced a catastrophic magnitude 8.0 event in 1976 -- killed eleven people, injured more than 700, and left thousands homeless across southern Mindanao. President Bongbong Marcos was halfway around the world at the APEC summit in San Francisco when the news broke.

Image: Mikenorton | CC BY-SA 3.0

November 2023 Mindanao Earthquake: A Collision Zone Beneath the Sea

Thu, 09 Apr 2026 00:00:00 GMT

Photo credit Gubernatoria, CC BY 2.5 au. Southern Mindanao sits atop one of the most complex tectonic boundaries on the planet. The Sunda Plate and the Philippine Sea Plate converge here obliquely, their collision accommodated by subduction along the Cotabato Trench and a network of strike-slip faults that thread throug...

Image: Gubernatoria | CC BY 2.5 au

November 2023 Mindanao Earthquake: Four Minutes of Terror in Glan

Thu, 09 Apr 2026 00:00:00 GMT

Photo credit Mikenorton, CC BY-SA 3.0. The town of Glan, in Sarangani province, bore the worst of the shaking. Instruments recorded Destructive intensity -- level VII on the Philippine seismological scale -- in Glan, where walls buckled, roofs caved in, and the ground itself cracked open. Four people died in Glan alon...

Image: Mikenorton | CC BY-SA 3.0

November 2023 Mindanao Earthquake: The Cost of Living on the Ring of Fire

Thu, 09 Apr 2026 00:00:00 GMT

Photo credit Mikenorton, CC BY-SA 3.0. The physical toll was staggering for a quake that lasted less than a minute. At least 542 houses collapsed outright. Nearly 8,800 more suffered damage across the Soccsksargen and Davao regions. In Glan alone, 295 homes were destroyed and 4,752 damaged; in Malapatan, 3,253 homes w...

Image: Mikenorton | CC BY-SA 3.0

November 2023 Mindanao Earthquake: Response and Resilience

Thu, 09 Apr 2026 00:00:00 GMT

Photo credit Mikenorton, CC BY-SA 3.0. The Philippine government's disaster response machinery engaged quickly. The National Disaster Risk Reduction and Management Council dispatched teams to the affected areas within hours. The Department of Social Welfare and Development had 140,579 family food packs staged at offic...

Image: Mikenorton | CC BY-SA 3.0