8th anniversary: The catastrophic 7.2-magnitude Bohol quake

Published October 15, 2021, 10:21 AM

by Ellalyn De Vera-Ruiz

Extensive lateral spreading near riverbanks of Napo River, Inabanga, Bohol after the Oct. 15, 2013 7.2-magnitude earthquake. (PHIVOLCS)

On this day, Oct. 15, a “very destructive” earthquake measuring 7.2-magnitude on the Richter scale shook Bohol province in 2013.

The strong shaking occurred at 8:12 a.m.

The earthquake’s epicenter was plotted near the boundary of the municipalities of Sagbayan and Catigbian in Bohol but was felt as far as southern Mindanao.

According to the Philippine Institute of Volcanology and Seismology (Phivolcs), the earthquake caused surface rupture and produced strong ground shaking, liquefaction, and earthquake-induced landslides.

Several collapsed sinkholes also appeared after the tremor.

This earthquake was generated by the North Bohol Fault, which according to Phivolcs had no previous surface manifestation.

It affected over 600,000 families, while at least 200 people died.

Over 79,000 structures including homes, roads, schools, and public buildings were damaged as a result of the intense shaking.

Century-old heritage churches in Bohol and Cebu were among those severely damaged.

Phivolcs said the estimated cost of damage to public infrastructures amounted to at least P2 billion or US$50 million.

On Nov. 30, 2013, more than a month after the earthquake, Phivolcs reported around 3,900 aftershocks, of which more than 100 were felt.