A SERIES of liquefactions or the loosening of waterlogged soil underground was monitored in various villages in Hagonoy, Davao del Sur, following the 6.9 magnitude earthquake.
In an interview Monday with Franz Irag, Office of Civil Defense Davao Region (OCD-Davao) operations officer, said the public does not need to worry since this is just a normal occurrence after a strong earthquake.
“Ang liquefactions isa ni sa mga hazard kung naay mahitabo nga linog usually mahitabo na siya sa mga reclaimed areas, mga dating tubigan gitambakan ug yuta unya gitukuran ug structure ug mga coastal areas nato like tong sa Hagonoy (Liquefaction is one of the hazards whenever there is a strong earthquake which usually happens in reclaimed areas and coastal areas),” Irag said.
As defined, soil liquefaction occurs when “a saturated or partially saturated soil substantially loses strength and stiffness in response to an applied stress such as shaking during an earthquake or other sudden change in stress condition, in which material that is ordinarily a solid behaves like a liquid.”
Based on the report from the Davao del Sur Provincial Disaster Risk Reduction and Management Office (PDRRMC), the liquefactions were reported in Barangays Aplaya, Balutakay, Leling, the coastal area of Guihing, Poligue, Poblacion, Sinayawan, San Isidro, Sacub. Kibuaya. Lapulabao, all in Hagonoy, Davao del Sur.
He further dismissed rumors that the recent quake was a volcanic activity that could trigger a volcanic eruption.
Irag said it was not volcanic related but tectonic in origin according to the Philippine Institute of Volcanology and Seismology. However, they are taking in consideration Mt. Apo as potentially active since there were no traces yet indicating that it has erupted before as per the study.
“Dili volcanic related cause ang kining linog nga nahitabo... Mailhan kung related sa volcanic activity ang linog kay naay ashfall or signals ihatag ang bulkan,” Irag said.