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Phivolcs: Magnitude-4.7 quake hits NCR, Luzon


(Update 3) Several residents in Metro Manila and nearby provinces in Luzon were jolted Tuesday morning when a magnitude-4.7 quake hit the area. Philippine Institute of Volcanology and Seismology (Phivolcs) director Renato Solidum Jr. said the quake was initially recorded at 10:10 a.m. “May reports na Intensity IV sa Manila at Intensity III sa Quezon City (We received reports indicating the quake measured Intensity IV in Manila and Intensity III in Quezon City)," Solidum said in an interview on dzBB radio. A Phivolcs bulletin said the epicenter was 26 km northwest of Nasugbu, Batangas. It added the quake measured magnitude 4.7 and was tectonic in origin. Phivolcs said the quake was felt at:
    Intensity IV- Manila; Dasmarinas, Cavite Intensity III- Quezon City; Pasay City; Pasig City Intensity II -Looc, Lubang, Occ. Mindoro Intensity I - San Fernando, Pampanga
No damage or aftershock was expected from the quake, Phivolcs said. The United States Geological Survey initially recorded the quake at magnitude 5.3. USGS said the epicenter was at 65 km southwest of Manila; 65 km northwest of Batangas; 80 km south-southeast of Olongapo; or 110 km northwest of Calapan, Mindoro. On the other hand, radio dzBB cited text messages indicating the quake was felt in Manila, Quezon City and Pasig City; and in Olongapo City (Zambales). Under Phivolcs’ scale, an Intensity IV quake is “moderately strong," or felt generally by people indoors and by some people outdoors. “Light sleepers are awakened. Vibration is felt like a passing of heavy truck. Hanging objects swing considerably. Dinner, plates, glasses, windows and doors rattle. Floors and walls of wood framed buildings creak. Standing motor cars may rock slightly. Liquids in containers are slightly disturbed. Water in containers oscillate strongly. Rumbling sound may sometimes be heard," it said. An Intensity III is “Weak" or felt by many people indoors especially in upper floors of buildings. “Vibration is felt like one passing of a light truck. Dizziness and nausea are experienced by some people. Hanging objects swing moderately. Still water in containers oscillates moderately," it said. An Intensity II quake is "Slightly felt" while an Intensity I quake is "scarcely perceptible." — LBG, GMA News
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