October 15, 2013 Earthquake: Bohol, Cebu, Siquijor Is, Philippines

At least 222 people killed and 8 missing on Bohol, Cebu and Siquijor Island. At least 976 people injured and 348,507 displaced; about 73,164 buildings, 18 roads, 41 bridges, 8 dams, 7 canals, 3 airports and 2 seaports destroyed or damaged; utilities disrupted and landslides occurred in Central and Western Visayas. Damage estimated at 51.8 million U.S. dollars. At least 5 km of surface faulting observed south of Inabanga, Bohol with as much as 3 m of vertical displacement. Felt (VII PIVS) at Tagbilaran City and (VII) at Carmen and Pinayagan. Felt (VII PIVS) at Carcar, Cebu City, Lapu-Lapu City, Mandaue City, Naga and Toledo; (VII) at Calero and Inayagan; (VI) at Consolacion, Jaclupan and Sandayong, Cebu. Felt (VII) at Sibulan; (VI PIVS) at Dumaguete City and Hinigaran; (VI) at Banilad, Negros. Felt (VI PIVS) on Siquijor Island. Felt as far as Baybay, Luzon; Begang, Basilan Island; Davao, Mindanao.

Tectonic Summary

The October 15, 2013 M 7.1 earthquake near the city of Catigbian on Bohol Island, Philippines, occurred as the result of shallow reverse faulting on a moderately inclined fault dipping either to the northwest, or to the southeast. The depth of the event indicates it ruptured a fault within the crust of the Sunda plate, rather than on the deeper subduction zone plate boundary interface. At the latitude of this earthquake, the Philippine Sea plate moves towards the west-northwest with respect to the Sunda plate at a rate of approximately 10 cm/yr, subducting beneath the Philippine Islands several hundred kilometers to the east of the October 15 earthquake at the Philippine Trench.

(above ref #1053)

LOON, Philippines. The earthquake that struck the central Philippines and killed at least 144 people also dealt a serious blow to the region's historical and religious legacy by heavily damaging a dozen or more churches, some of them hundreds of years old... The bell tower toppled from Cebu city's 16th-century Basilica of the Holy Child -- a remnant of the Spanish colonial era and the country's oldest church building -- becoming a pile of rubble in the courtyard by the front gate. Other churches on the neighboring island of Bohol, epicenter of the quake and a popular tourist destination, were also damaged, some beyond repair, while the Bohol seaside town of Loon was a jumble of toppled houses, churches and other buildings. (reference #10761)

The quake struck at 8:12 am and was centered about 20 miles below Carmen city, where many small buildings collapsed. Many roads and bridges were reported damaged, making rescue operations difficult. But historic churches dating from the Spanish colonial period suffered the most. Extensive damage also hit densely populated Cebu city, across a narrow strait from Bohol, causing deaths when a building in the port and the roof of a market area collapsed. (ref #10762)

Based on the report of the National Disaster Risk Reduction and Management Council yesterday morning, the death count hit 186. Out of this total, 173 deaths were reported from Bohol, 12 from Cebu, and one fatality reported from Siquijor. The tally of the number of injured people reached 583 coming from Bohol, Cebu, Siquijor, Iloilo and Negros Occidental. A total of 11 people are still reported missing based on the latest report. The same report said that partial damage cost increased to P876.24 million from yesterday's P659.64 million. (ref #10769)

MANILA: A deadly earthquake that struck the Philippines last week created a spectacular rocky wall that stretches for kilometres through farmlands, astounded geologists said Thursday. A "ground rupture" pushed up a stretch of ground by up to three metres, creating a wall of rock above the epicentre […](ref #10772)

230 dead, 976 injured, 51.459 million USD total damages (ref #1250)

USD 163 million USD in economic loss (reference #13727)