Magnitude 5.1 aftershock jolts Cebu, nearby areas

A magnitude 5.1 tectonic aftershock struck offshore northeast of Bogo City at 5:39 a.m. yesterday, the strongest tremor so far since the magnitude 6.9 earthquake that hit Northern Cebu on September 30.

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The Philippine Institute of Volcanology and Seismology (PHIVOLCS) said the quake, which was felt across Cebu, Leyte, Biliran, Bohol, Masbate, and Capiz, is part of an ongoing aftershock sequence expected to continue for several days to weeks.

PHIVOLCS reported Intensity IV or “Moderately Strong” shaking in Bogo City, Villaba, Tabango, and San Isidro, Leyte. Under the PHIVOLCS Earthquake Intensity Scale (PEIS), this level is comparable to the vibration of a passing heavy truck, with rattling of windows and plates, creaking of wooden structures, and noticeable sloshing of water in containers. Light sleepers may be awakened, and a rumbling sound may sometimes be heard.

Instrumental intensities were recorded at Intensity III (“Weak”) in Cebu City, Ormoc, and Hilongos; Intensity II (“Slightly Felt”) in Danao, Asturias, Lapu-Lapu City, Talisay, Argao, and San Francisco, Cebu; and Intensity I (“Scarcely Perceptible”) in parts of Masbate, Capiz, Negros Occidental, and Northern Samar.