Wednesday, July 13, 2011
The epicenter was 93 kms. southwest of Dumaguete City in Negros Oriental, said Science Research Specialist Rolando Montañez of the Phivolcs Seismic Monitoring Station in Lapu-Lapu City.A TEMBLOR with a 6.2 magnitude was reported in the Visayas at dawn yesterday, according to the Philippine Institute of Volcanology and Seismology (Phivolcs).
He said the offshore earthquake was tectonic in origin.
A tectonic earthquake happens when stress accumulated along geologic faults or by volcanic activity is released. Western Visayas is located along the Philippine Fault.
The Phivolcs Earthquake Intensity Scale is the measure of intensity that is based on the effect to people, structures and objects in the surroundings.
There was a reported intensity 5 quake in Sipalay, Negros Occidental. The areas that experienced intensity 4 earthquake are Oton in Iloilo Province, Dumaguete City in Negros Oriental, Binalbagan and Hinigaran in Negros Occidental and Sibulan town also in Negros Oriental.
Intensity 3 quake was felt in San Jose in Antique, Dapitan City in Zamboanga del Norte, Talisay City in Negros Occidental and the entire Cebu Province.
Cagayan de Oro City, Dipolog City and La Carlotta town in Negros Occidental experienced intensity 2 quake while an intensity 1 quake was reported at La Castillana in Negros Occidental.
Montañez said property damages and aftershocks are expected only near the epicenter.
He said the entire Cebu felt the quake but there were no damages reported.
He said earthquakes are a natural occurrence in the country, which experiences up to 20 tremors a day.
According to the Phivolcs website, there were two more earthquakes felt with one in Cauayan, Negros Occidental at 5:03 a.m. with a magnitude of 5.7 and at 5:05 a.m. with a magnitude of 5.5 west of Dumaguete City.
Published in the Sun.Star Cebu newspaper on July 13, 2011.
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