Authors: Arturo S. Daag, Margarita P. Dizon, Roland Joseph B. De Leon, Dan Gil S. Fermo, Veronica Theresse M. Pagbilao and John Michael Dipatuan

Department of Science and Technology – Philippine Institute of Volcanology and Seismology (DOST-PHIVOLCS)

Download link: https://bit.ly/2023-OffshoreDavaoOccEq-EIL

 

INTRODUCTION

The Department of Science and Technology – Philippine Institute of Volcanology and Seismology (DOST-PHIVOLCS) researchers under the “Ground Shaking (GS) and Earthquake-Induced Landslide (EIL) Information Research in the Philippines (SLIP Project)” visited the municipality of Glan in the province of Sarangani on 03-07 June 2024 to gather geophysical data, and to investigate and assess the landslides induced by the 17 November 2023 Mw 6.8 Offshore Davao Occidental Earthquake. The collected information will be utilized in the team’s research and development efforts to characterize event-based earthquake impacts specific to landslide occurrences. Additionally, the team disseminated earthquake information to the local government units (LGUs) and residents of the affected areas.

The team was able to compile a range of landslide reports from the DOST-PHIVOLCS Quick Response Team (QRT), Disaster Risk Reduction and Management Offices (DRRMOs), LGUs, and validated social media posts before the survey. Notable landslide incidents that were covered by all of these sources include the landslides along the road cut in Brgy. Kapatan that caused partial to total road blockages, and the massive landslide in Brgy. Mudan that caused fatalities and damming of the Glan Padidu Creek. A landslide inventory based on the remote sensing (RS) interpretation of satellite images was also compiled. This report discusses the impacts of landslides in Glan caused by the Mw 6.8 earthquake, as well as the assessments and recommendations.

 

Citation:

Daag, A.S., Dizon, M.P., De Leon, R.J.B., Fermo, D.G.S., Pagbilao, V.T.M. and Dipatuan, J.M. 2025. Earthquake-induced Landslide Impacts of the 17 November 2023 Mw 6.8 Offshore Davao Occidental Earthquake in the Municipality of Glan, Province of Sarangani. PHIVOLCS Open-File Report No. 25-03, 25 pages.