The recent earthquake in Central Visayas is now officially the 5th deadliest earthquake in Philippine history in terms of casualties and devastation.
The earthquake that occurred at 8:12:31 AM Philippine time, October 15, last Tuesday had an intensity of Magnitude 7.2 measured at its epicenter which is located at located 6 kilometres (3.7 mi) SW of Sagbayan, Bohol, at a depth of 12 kilometres (7.5 mi).
Initial reports from the Philippine Institute of Volcanology and Seismology (PHIVOLCS) had placed the epicenter at 2 km. (1.2 mi) east of Carmen, triggered by the East Bohol Fault. But one day later, (Oct. 16), PHIVOLCS clarified that pattern of epicenters of aftershocks that followed, actually showed that it may have been triggered by an undiscovered fault line that transects Bohol along the ENE-WSW direction, parallel to the province northwest coast.
Official records from National Disaster Risk Reduction and Management Council (NDRRMC) as of October 17, 2013 (PH time) has pegged the number of casualties to 156 dead , 22 missing and 374 injured. Authorities also expected these numbers to still rise as rescuers struggled to find survivors beneath the rubble of concrete debris.
Damage to infrastructure such as roads, bridges and flood controls in the provinces of Bohol and Cebu is estimated at P75.15 Million. More than 3 million individuals or 593, 561 families were affected, of whom 37,000+ people, or 7,430 families were either displaced or left without a home.
Despite its epicenter being recorded at a Bohol town, tremendous earth shaking of varying magnitudes were also felt in nearby provinces and cities that extended to as far as Mindanao.
Besides Cebu province, intensity VI was recorded in Negros, Occidental; IntensityV in Iloilo, La Carlota, Guimaras, Leyte(Abuyog) and Negros Occidental (Sibulan); Intensity IV in Roxas City, Masbate, Bacolod, Sorsogon (Bulusan), Antique (Patnungon and San Jose), Leyte (Tacloban, Hinunangan, Bato and Tabon) and Southern Leyte; Intensity II in Samar (Boronagan) and Laon, Antique and other towns of Aklan.
In Mindanao island, Intensity V was recorded in Misamis Oriental (Gingoog) and Cagayan de Oro; Intensity III in Davao City, Cotabato, Zamboanga, Surigao Bukidnon and Zamboanga del Norte; and Intesity II in Tacurong.
As of October 17, 2013, (PH time) 1,213 aftershocks have been recorded according to a bulletin released by NDRRMC, including a magnitude 5.5 on the early morning of the same day.
Below is the updated list of the deadliest earthquakes in Philippine history:
Ten Deadliest Recorded Earthquakes in the Philippines since 1600
Magnitude Origin Location Date Mortality Missing Injured Damage
1. 7.9 Tectonic Moro Gulf Aug. 16, 1976 4,791 2,288 9,928 -
2. 7.8 Tectonic Luzon Isl. Jul. 16, 1990 1,666 1,000 3,000+ PHP10B
3. 7.5 Tectonic Luzon Isl. Nov. 30, 1645 600 3,000 Unknown -
4. 7.3 Tectonic Aurora Aug. 02, 1968 271 261 – -
5. 7.2 Tectonic Bohol Oct. 15, 2013 156 22 374 PHP4B(est)
6. 7.1 Tectonic Mindoro Nov. 15, 1994 78 430 – PHP5.15M
7. 6.7 Tectonic Negros Or. Feb. 06, 2012 51 62 112 PHP383M
8. 8.1 Tectonic Panay Is. Jan. 25, 1948 50(est) – – PHP5M
9. Unknown Tectonic Manila Jun. 19, 1665 19 – – Unknown
10. 6.5 Tectonic Laoag Aug. 17, 1983 16 – 47 Unknown