The sea waters off Sultan Naga Dimaporo (SND), Lanao del Norte, receded by about two meters from the shores following the magnitude 7.8 tectonic quake that struck Mindanao Monday morning, prompting school officials to cancel classes in the town’s 16 coastal villages.
Jennifer Senerpida, SND Municipal Disaster Risk Reduction Management Officer, said they observed the sea waters receding and returned to normal situation after 15 minutes.
‘We observed the sea waters receding thrice,’ she said, adding that the water elevation in the rivers was also shaken by the quake.
The Lanao del Norte Schools Division, in coordination with the local government unit, ordered the cancellation of classes in the coastal villages of SND, she said.
The PHIVOLCS issued a tsunami alert in the aftermath of the strong earthquake for nine Mindanao provinces. But the advisory did not include Lanao del Norte province.
The tsunami alert covered Sarangani, Davao Occidental, Tawi-Tawi, Siulu, Basilan, Zamboanga Sibugay, Sultan Kudarat, and South Cotabato.
Abeliza Manzano, chief of the Provincial Disaster Risk Reduction Management Office (PDRRMO), said that based on their monitoring, a magnitude 3 was recorded in Kapatagan town and a magnitude 2 in the province’s capital town of Tubod.
Abeliza said the PDRRMOP was still monitoring the situation across the province.
In Iligan City, Mayor Frederick W. Siao issued Executive Order 61 Series of 2026 ordering the suspension of classes in all levels from June 8 to 9 to give way for the assessment of the structural integrity of school buildings.
The magnitude 7.8 earthquake struck at 7:37 a.m. some 32 kilometers southwest of Maasim, Sarangani, with a depth of 33 km, PHIVOLCS said.