Magnitude 6.3 earthquake jolts Dalupiri Island in Cagayan

Metro Manila (CNN Philippines, September 12) — A magnitude 6.3 earthquake hit waters off Dalupiri Island in Cagayan on Tuesday evening, with state seismologists warning of aftershocks.

The Philippine Institute of Volcanology and Seismology (Phivolcs) said the quake occured at 7:03 pm. Phivolcs earlier recorded the temblor as magnitude 6.4, but has since issued the downgrade.

According to the agency, damage and aftershocks are expected, but there is no threat of a tsunami.

The agency recorded Intensity V ("strong" shaking) in the following areas: Bacarra, Bangui, Burgos, City of Laoag, Pagudpud, Paoay, Pasuquin, and San Nicolas, Ilocos Norte

Phivolcs listed reported intensities in the following areas:

- Intensity IV (“moderately strong” shaking): Luna, Apayao; City of Batac, Currimao, and Pinili, Ilocos Norte; Claveria, Enrile, Pamplona, Sanchez-Mira, and Santa Praxedes, Cagayan;

- Intensity III (“weak” shaking): Bucay, Lacub, Lagayan, and San Juan, Abra; Banayoyo, Bantay, Burgos, Caoayan, San Emilio, San Esteban, San Ildefonso, San Vicente, Santa Catalina, Santa Cruz, Santiago, Sigay, and City of Vigan, Ilocos Sur; Solana, Cagayan; Santo Domingo, Nueva Ecija;

- Intensity II (“slightly felt” shaking): Dolores, La Paz, Luba, Pidigan, and Tubo, Abra; Narvacan, Santa, and Santa Maria, Ilocos Sur; Aparri, Cagayan; and

- Intensity I (“scarcely perceptible” shaking): San Isidro, Abra; City of Candon, and Tagudin, Ilocos Sur; Camalaniugan, Lal-Lo, and Santa Ana, Cagayan.

Phivolcs said the tremor had a depth of 41 kilometers and was tectonic in origin, which means it was caused by movement in the Earth's crust.