West Valley Fault

A magnitude 7.1 quake just hit Mindanao early morning this Tuesday. The Philippine Institute of Volcanology and Seismology (Phivolcs) determined the epicenter to be 154 kilometers southeast of Balut Island in Sarangani.

It had a depth of 72 kilometers and struck at 4:48 in the morning. Phivolcs then downgraded the magnitude to 6.7.

The following intensities have been reported:

Intensity IV– Glan, Malungon, and Kiamba, SARANGANI

Intensity III – CITY OF GENERAL SANTOS; City of Koronadal, Tupi, Polomolok, and T’boli, SOUTH COTABATO; Alabel, and Malapatan, SARANGANI; Matalam, COTABATO

Intensity II – Tampakan, Tantangan, Banga, Norala, Santo Niño, Surallah, and Lake Sebu, SOUTH COTABATO; CITY OF ZAMBOANGA; Maitum, SARANGANI; City of Kidapwan, Makilala, M’lang, Pigcawayan, Tulunan, and Kabacan, COTABATO; President Quirino, SULTAN KUDARAT

Intensity I – CITY OF CAGAYAN DE ORO; Maasim, SARANGANI; Arakan, COTABATO; Isulan, SULTAN KUDARAT

Seismic instruments in several areas reported the following intensities:

Intensity IV– Malungon, Alabel, Kiamba, and Glan, SARANGANI

Intensity III– City of Koronadal, Tupi, and T’boli, SOUTH COTABATO; Malapatan, SARANGANI; Nabunturan, DAVAO DE ORO; Don Marcelino, DAVAO OCCIDENTAL; City of Digos, DAVAO DEL SUR; City of Gingoog, MISAMIS ORIENTAL

Intensity II– Banga, Norala, Lake Sebu, Santo Niño, Tantangan, and Tampakan, SOUTH COTABATO; Maitum, and Malungon, SARANGANI; Columbio, President Quirino, Lambayong, Lebak, and Esperanza, SULTAN KUDARAT; CITY OF DAVAO; Magsaysay, and Matanao, DAVAO DEL SUR; CITY OF ZAMBOANGA; San Fernando, BUKIDNON; City of Kidapwan, COTABATO

The tremor which was tectonic in origin did not trigger a tsunami alert according to the US Tsunami Warning System and no reports of damage or injuries were immediately known.

Phivolcs also ruled out any possible aftershocks.

Source: TheManilaTimes, GMANewsOnline, Phivolcs