The Philippine Institute of Volcanology and Seismology (Phivolcs) has recorded a 5.1-magnitude earthquake in Abra province early Monday morning, August 1.
Phivolcs said the quake struck 4 kilometers northeast of Villaviciosa, Abra at 2:48 a.m., with a depth of 13 kilometers.
It said the tremor was an aftershock of the 7.0-magnitude earthquake that struck Tayum, Abra on July 27.
The earthquake on Monday was felt at Intensity V as a “strong” tremor in Dolores, Abra; Vigan City, Sinait, Bantay, Banayoyo, Nagbukel, Gregorio del Pilar, Suyo, Sugpon, San Ildefonso, Santa, Magsingal, San Juan, and Cabugao in Ilocos Sur; Pinili and Badoc in Ilocos Norte; and Besao and Sagada in Mountain Province.
It was registered at Intensity IV (moderately strong) in Bangued, Abra; Laoag City, Bacarra, and Pasuquin in Ilocos Norte; Sto. Domingo, San Vicente, Sta. Catalina, Candon City, Santa, Narvacan, San Esteban, Sta. Maria, Caoayan, Sta. Lucia, Sta. Cruz, and Tagudin in Ilocos Sur; Sudipen, Luna, Balaoan, Bangar, Bacnotan, and City of San Fernando in La Union; and Bontoc and Sadangga in Mountain Province.
Baguio City; Flora and Santa Marcela in Apayao; Tabuk City in Kalinga; Bauko and Tadian in Mountain Province; Luna, Apayao; and Tuguegarao City, Lal-lo, Allacapan, Gattaran, Lasam, Amulung, Claveria, Sanchez Mira, and Abulug in Cagayan felt the quake at Intensity III (weak); while Santiago City, Ramon, and Quezon in Isabela; Cabarroguis, Quirino; and Aparri, Cagayan felt the quake at Intensity II (slightly felt).
It was also recorded at Intensity I (scarcely perceptible) in Itogon, Benguet.
Over 2,000 aftershocks after magnitude 7.0 quake
As of 7 a.m., Phivolcs had recorded 2,009 aftershocks, with magnitudes ranging from 1.4 to 5.1.
Of the recorded earthquakes, Phivolcs had plotted 672 earthquakes close to the epicenter of the main shock in Tayum, Abra.
It said that 53 of these tremors were felt.