(UPDATED) A strong, shallow earthquake with magnitude of 6.9 shook Davao Sunday afternoon, December 15, sending residents fleeing from their houses and condominium units.

The Philippine Institute of Volcanology and Seismology (Phivolcs) said the tectonic quake struck about nine kilometers north of Matanao town in Davao del Sur at a depth of only three kilometers.

Damage and aftershocks are expected.

Phivolcs revised details of the quake in an advisory issued about an hour after it occurred.

The quake struck at 2:11 p.m. Sunday. Phivolcs initially reported its epicenter at six kilometers north of Padada.

In its latest advisory, Phivolcs said the tremor was felt in the following areas:

Intensity VII - Matanao & Magsaysay, Davao del Sur;

Intensity VI - Kidapawan City; General Santos City; Bansalan, Davao del Sur; Alabel & Malapatan, Sarangani; Koronadal City;

Intensity V - Tulunan & Matalam, Cotabato; Cotabato City; Davao City; Glan, Sarangani.

Intensity III - Kalilangan, Talakag & Dangcagan, Bukidnon.

Intensity II - Impasugong, Bukidnon; Cagayan de Oro City; Dipolog City

Intensity I - Zamboanga del Sur.

Instrumental intensities were recorded in the following areas:

Intensity VIII - Malungon, Sarangani;

Intensity VI - Alabel, Sarangani; Kidapawan City;

Intensity V - General Santos City; Koronadal City; Tupi, South Cotabato;

Intensity III - Gingoog City;

Intensity II - Zamboanga City; Kiamba, Sarangani.

(MVI/SunStar Philippines)