A 5.4 magnitude tectonic quake first jolted some parts of the Ilocos region and the provinces of Abra and Benguet at around 2:27 a.m. It was centered 46 kilometers southwest of Vigan in Ilocos Sur.
The quake was felt at intensity four in Vigan City, Sto. Domingo, Ilocos Sur and Bangued, Abra; intensity three in Sinait, Ilocos Sur, Laoag and Baguio City; and intensity one in Pasuquin, Ilocos Norte.
The second quake of magnitude 4.2 struck 36 kilometers southeast of Surigao City at 11:04 a.m. The tremor was felt at intensity 2 in Butuan City.
Phivolcs said the quakes did not generate aftershocks. – With Jun Elias