Earthquake information map for the magnitude 5.7 quake which struck off Davao Oriental on December 4. Image from the Philippine Institute of Volcanology and Seismology (Phivolcs).
MANILA (UPDATE) – A magnitude 5.7 earthquake struck off Davao Oriental province on Wednesday morning but it was not strong enough to trigger a tsunami, the Philippine Institute of Volcanology and Seismology (Phivolcs) said.
Phivolcs said the quake occurred at 7:58 a.m. and its epicenter was located 57 kilometers southeast of Mati, Davao Oriental.
The following earthquake intensities were felt:
- Intensity V - Davao City; Mati Davao Oriental; Toril, Davao Del Sur;
- Intensity IV - Digos City; Don Marcelino and Malita, Davao Del Sur;
- Intensity III - Butuan City; Kidapawan City; Tagum City; Panabo City; Compostela Valley; Matanao, Davao Del Sur;
- Intensity II - San Francisco, Agusan Del Sur; Cotabato City; Gen. Santos City; Koronadal City; Polomolok South Cotabato; Alabel Sarangani.
Phivolcs said Intensity V, so far the strongest recorded from this quake, is "generally felt by most people indoors and outdoors. Many sleeping people are awakened. Some are frightened, some run outdoors.
"Strong shaking and rocking felt throughout the building. Hanging objects swing violently. Dining utensils clatter and clink; some are broken. Small, light and unstable objects may fall or overturn. Liquids spill from filled open containers. Standing vehicles rock noticeably. Shaking of leaves and twigs of trees are noticeable."
Phivolcs said aftershocks are expected from the quake but no damage has been reported so far. The quake struck at a depth of 52 kilometers.
Speaking to ANC, Phivolcs executive director Renato Solidum said a movement in either the Philippine Fault Zone or the Philippine Trench may have triggered the quake.
He noted that the tremor is not related to the magnitude 7.2 quake that struck Bohol last October 15, and no tsunami alert has been raised so far.
"These are different earthquake generators from the Bohol fault," Solidum said. "The magnitude of the quake is not very large so it is not enough to trigger any tsunami."
The United States Geological Survey, meanwhile, measured the magnitude of the quake at 5.5.