LUCENA CITY — Two successive earthquakes of tectonic origin struck the island town of Patnanungan in Quezon province early Friday, March 15. The Philippine Volcanology and Seismology (Phivolcs) said the first tremor with a magnitude of 3.9 was detected 91 kilometers northeast of Patnanungan at 1:59 a.m. with a 7-km depth of focus. Earlier, a
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