Magnitude 5.7 quake hits Zambales, affects Metro Manila

MANILA. Office workers at Hanston Square in Pasig City were asked to evacuate the building. (Photo courtesy of Fiona Villamor)

UPDATED - A tectonic earthquake with a magnitude of 6.1 (initially reported by the Philippine National Seismic Network at 5.7) hit near Castillejos, Zambales at 5: 11 p.m., Monday, April 22, and was felt in Metro Manila.

The Philippine Institute of Volcanology and Seismology (Phivolcs) said damage and aftershocks were expected.

The quake was strong enough to send people out of their buildings in Quezon City and Pasig City, Metro Manila.

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A Phivolcs advisory issued at 6:03 p.m. said the quake had a depth of focus of only 12 kilometers and was felt at various intensities in the following areas:

Intensity V (strong) - San Felipe, Zambales; Malolos and Obando, Bulacan; Quezon City; Lipa, Batangas;

Manila City; Abucay, Bataan; Valenzuela City; Magalang, Pampanga

Intensity IV (moderately strong) - Pasig City; Makati City; Caloocan City; Meycauayan and San Jose Del Monte,

Bulacan; Floridablanca, Pampanga; Villasis, Pangasinan; Tagaytay City; Villasis, Pangasinan;

Baguio City; Marikina City; Las Pinas City

Intensity III (weak) - Dasmarinas, Indang and Gen. Trias, Cavite; Lucban, Quezon; Muntinlupa City,

Cabanatuan City; Palayan City; Gapan City; Santo Domingo and Talavera, Nueva Ecija

Intensity II (slightly felt) - Baler, Aurora

Intensity V (strong) is characterized by strong shaking and rocking of buildings. Hanging objects swing violently. Small, light, and unstable objects may fall or overturn and vehicles rock noticeably, according to Phivolcs.

The quake was also felt at varied instrumental intensities in several areas from Ilocos Sur down to Camarines Norte.

This was followed by two earthquakes near Olongapo City in Zambales, a magnitude 3.0 at 5:15 p.m. and a magnitude 2.6 at 5:26 p.m., Phivolcs said.

Another earthquake, with magnitude of 2.2, was plotted near Angeles City, Pampanga at 5:46 p.m. Monday. No damage nor aftershocks were expected in the last three quakes. (MBV/Sunstar Philippines)


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