West Valley Fault

Davao Occidental was once again hit by a massive earthquake. Last night at 8:23 pm, a magnitude 7.1 tremor was reported 244 kilometers southeast of Jose Abad Santos in Davao Occidental.

It has depth of 11 kilometers and was tectonic in origin. Director Renato Solidum of the Philippine Institute of Volcanology and Seismology (PHIVOLCS), said that there is no threat for a tsunami. Phivolcs released a bulletin right away to allay fears and to counter any misinformation regarding this threat.

IRIS Earthquake posted an animation showing how the tremor travelled throughout the United States. It was negligible but was strong enough to be picked up by their seismic instruments.

That's what this animation is showing – the waves from the M7.0 earthquake traveling both through the earth and across earth's surface – in the continental US the earthquake the waves are much too small to feel but not too small to measure. pic.twitter.com/KXGB1JsFHg

— EarthScope Consortium (@EarthScope_sci) January 21, 2021

The following intensities have been recorded.

Intensity V was felt in General Santos City, while Intensity IV was felt in Davao City.
Intensity II was felt in Bisig City and Surigao del Sur.

Instrumental Intensities were also felt in the following areas:

Intensity V – Kiamba, Sarangani
Intensity IV – City of General Santos; Alabel, Sarangani; Koronadal City, South Cotabato
Intensity III – City of Kidapawan City of Bislig, Surigao del Sur; City of Gingoog, Misamis Oriental
Intensity II – City of Cagayan de Oro; City of Surigao, Surigao del Norte; City of Borongan, Eastern Samar
Intensity I – City of Catbalogan, Samar

The director also mentioned that there will be aftershocks.

Sources: ABSCBN/Phivolcs/IRIS/PHStar