Magnitude 6.4 earthquake shakes Sarangani, Davao Occidental

Metro Manila (CNN Philippines, October 4) — A magnitude 6.4 earthquake hit waters off Sarangani Island in Sarangani, Davao Occidental on Wednesday night, state seismologists said.

The Philippine Institute of Volcanology and Seismology (Phivolcs) said the quake occurred at 7:21 p.m. It was earlier pegged at magnitude 6.1.

Phivolcs warned of aftershocks while damage is not expected.

The following earthquake intensities were recorded in these areas:

Intensity V or "strong" shaking felt in Sarangani and Don Marcelino, Davao Occidental; Kiamba and Malungon, Sarangani; City of Digos, Davao Del Sur.

Intensity IV or “moderately strong” shaking in General Santos City, City of Koronadal, Tupi, T'boli, Polomolok, South Cotabato; Jose Abad Santos, Davao Occidental; Palimbang, And Esperanza, Sultan Kudarat.

Intensity III or “weak” shaking in Alamada, Banisilan, City of Kidapawan, Magpet, Makilala, M'lang, Matalam, Pigcawayan, and Tulunan, Cotabato; Kalamansig, Lambayong, President Quirino, Senator Ninoy Aquino, and City of Tacurong, Sultan Kudarat; Lake Sebu, Tampakan, Santo Niño, and Surallah, South Cotabato.

Intensity II or “slightly felt” shaking in City Of Zamboanga; Antipas, Arakan, Libungan, qnd President Roxas, Cotabato; Bagumbayan, Sultan Kudarat; San Fernando, and Kalilangan, Bukidnon; City of Gingoog, Misamis Oriental; Tantangan, South Cotabato; Cotabato City; Datu Odin Sinsuat, and Sultan Kudarat, Maguindanao Del Norte.

Intensity I or “scarcely perceptible” tremors were experienced in City of Cagayan De Oro; Pangantucan, and Cabanglasan, Bukidnon; Aleosan, Cotabato.

Phivolcs said the tremor had a depth of 139 kilometers and was tectonic in origin, which means it was caused by movement in the Earth's crust.