A magnitude 7.4 earthquake struck Surigao del Sur on Saturday night, with a tsunami warning immediately issued by the Philippine Institute of Volcanology and Seismology (Phivolcs).
The epicenter was recorded east of Hinatuan at 10:37 p.m.
Phivolcs first recorded it at magnitude 6.9.
Intensity VII (Destructive) was felt in Tandag City; Intensity VI (Very Strong) in Bislig City; and Intensity V (Strong) in Cagayan de Oro City; Nabunturan, Davao de Oro; and Davao City.
By Sunday past midnight, strong aftershocks were recorded by Phivolcs at 12:03 a.m., magnitude 6.1, Lingig, Surigao del Sur; 12:19 a.m., magnitude 5.1, Hinatuan; and 12:53 a.m., magnitude 5.7, also in Hinatuan.
They were followed by magnitudes 6.2 at 1:40 a.m., 5.0 at 1:55 a.m., and 5.2 at 3:36 a.m. — all in Hinatuan.
In between, there were several aftershocks ranging from magnitudes 1.9 to 4.5.
Several videos posted on social media showed residents fleeing their communities and going to evacuation centers.
Phivolcs urged residents in coastal areas of Surigao del Sur and Davao Oriental to immediately evacuate to higher ground or move farther inland amid the threat of a tsunami.
“Based on the local tsunami scenario database, it is expected to experience wave heights of more than one meter above the normal tides and may be higher on enclosed bays and straits. Destructive tsunami is expected with life-threatening wave heights,” the agency warned.
Tsunami warning lifted
At 3.23 a.m. Sunday, Phivolcs reported that the last recorded tsunami wave arrival occurred at 2:52 a.m. at Hinatuan-Bislig Bay Station on Mawes Island.
“This means that the tsunami threat associated with this earthquake has now largely passed the Philippines,” the Phivolcs advisory said.
The local governments of threatened coastal areas were asked to assess the tsunami’s impact.
Evacuation
Meanwhile, the powerful quake triggered thousands from different areas in the province to leave their houses when Phivolcs issued the tsunami warning.
Residents in coastal areas of Tandag and Bislig cities, and the municipalities of Carrascal and Cortes were advised to stay in the evacuation centers until the tsunami warning was lifted.
The tremor also damaged infrastructures in the different parts of the Caraga Region.
In the municipality of Hinatuan, Mayor Shem Garay formed a Damage Assessment and Needs Analysis team to check on government buildings, roads and bridges, schools and other establishments.
In Tagbina town, a landslide occurred Saturday evening, rendering a portion of the Tagongon-Sta Maria-Sta Juana-Bislig Road impassable. (With a report from Alexander Lopez/PNA)