Metro Manila, Philippines — A magnitude 6.8 earthquake hit the waters off Surigao del Sur on Saturday morning, Aug. 3.

These are the reported intensities:

+ Intensity V – Lingig, Hinatuan, and City of Bislig, Surigao del Sur; Rosario, Agusan del Sur; Maco And Monkayo, Davao de Oro

+ Intensity IV – Nabunturan, Davao de Oro; City of Davao

+ Intensity III – Don Marcelino, Davao Occidental; Inabanga, Bohol; City of Baybay, Leyte

+ Intensity II – Mambajao, Camiguin; Sogod, Southern Leyte; City of Cotabato; Datu Odin Sinsuat, Maguindanao

These are the instrumental intensities:

+ Intensity IV – Nabunturan, Davao de Oro

+ Intensity III – Abuyog, Leyte; City of Digos, Davao Del Sur; Malungon, Sarangani; City of Tandag, Surigao Del Sur

+ Intensity II – City of Cebu; Carigara, and Dulag, Leyte; Sogod, Southern Leyte; Kadingilan, Kalilangan, City of Malaybalay, and San Fernando, Bukidnon; Balingasag, Misamis Oriental; City of Cagayan De Oro; Magsaysay, Davao Del Sur; Banisilan, City of Kidapawan, and Magpet, Cotabato; Glan, Sarangani; City of Koronadal, and Tampakan, South Cotabato

+ Intensity I – Can-Avid, Eastern Samar; Alangalang, Albuera, and Kananga, Leyte; San Roque, Northern Samar; City of Catbalogan, Samar; Molave, Zamboanga Del Sur; Malitbog, Bukidnon; Carmen, and President Roxas, Cotabato; Kiamba, Sarangani; Norala, and Surallah, South Cotabato

The tectonic tremor happened at 6:22 a.m., and its epicenter was located 66 kilometers (km) northeast of Lingig town, according to the Philippine Institute of Volcanology and Seismology (Phivolcs).

It had a shallow depth of 9 km, state seismologists said.

Phivolcs upgraded its advisory from the initial magnitude 6.5.

By 9:38 a.m., it recorded a major but still offshore aftershock, at magnitude 5.5, located 57 km southeast of Lingig town. A magnitude 6.2 aftershock, also hitting waters off the town, was logged at 12:20 p.m.

Phivolcs said it did not expect damage but warned authorities of aftershocks. It did not issue a tsunami threat.

As of 6 p.m., the bureau said it recorded 521 aftershocks.