2013 Bohol earthquake
The rubble of the Church of Our Lady of Light in Loon, Bohol, the oldest and one of the largest in the province
|Date||October 15, 2013|
|Origin time||0:12:32 UTC|
|Depth||12.0 km (7.5 mi)|
|Max. intensity||PEIS – VII (Destructive)|
|Aftershocks||4,465 (122 felt) (as of December 31, 2013)|
|Casualties||222 dead; 8 missing; 976 injured|
The 2013 Bohol earthquake occurred on 15 October at 8:12:32 PST in Bohol, an island province located in Central Visayas, Philippines. The magnitude of the earthquake was recorded at Mw 7.2, with epicenter 6 kilometres (3.7 mi) S 24° W of Sagbayan, and its depth of focus was 12 kilometres (7.5 mi). It affected the whole Central Visayas region, particularly Bohol and Cebu. The quake was felt in the whole Visayas area and as far as Masbate island in the north and Cotabato provinces in southern Mindanao.
According to official reports by the National Disaster Risk Reduction and Management Council (NDRRMC), 222 were reported dead, 8 were missing, and 976 people were injured. In all, more than 73,000 structures were damaged, of which more than 14,500 were totally destroyed.
It was the deadliest earthquake in the Philippines in 23 years since the 1990 Luzon earthquake. The energy released by the quake was equivalent to 32 Hiroshima bombs. Previously, Bohol was also hit by an earthquake on 8 February 1990 that damaged several buildings and caused a tsunami.
On 7 November, just 3 weeks after the quake, Super Typhoon Haiyan (Yolanda) struck the region. Although the storm's eye missed the area affected by the earthquake, it sent some 40,000 Boholanos still living in temporary shelters back to evacuation centers and disrupted relief efforts in the province.
- 1 Geology
- 2 Warnings
- 3 Casualties and infrastructure damage
- 4 Effects
- 5 Response
- 6 See also
- 7 References
- 8 Sources
Initially it was thought that the epicenter was 2 kilometres (1.2 mi) east of Carmen, Bohol, triggered by the East Bohol Fault. But according to the Philippine Institute of Volcanology and Seismology (PHIVOLCS), the 7.2 earthquake may have been caused by a previously undiscovered fault line transecting Bohol running ENE-WSW parallel to the island's northwest coast. This was apparent in the pattern of epicenters of the subsequent aftershocks.
On 20 October a team of state volcanologists led by Dr. Teresito Bacolcol had discovered the theorized new fault (now named North Bohol Fault) in Inabanga, a town 20 kilometres (12 mi) north of the epicenter. Vertical displacement, as much 3.0 metres (10 ft), was noted in the landscape of the town. According to experts, the fault may be as much as 100 kilometres (62 mi) long. It was also noted that Bohol gained around 500 meters more of shoreline due to the quake and shifted 55 centimetres (22 in) west towards Cebu Island.
North Bohol Fault
PHIVOLCS reported that the North Bohol Fault (NBF), which generated the Mw 7.2 earthquake, is a northeast–southwest trending reverse fault along the western sector of Bohol island. Surface ruptures ranging from 0.10 metres (3.9 in) to as high as 5 metres (16 ft) in vertical displacements were exposed in barangay Anonang in Inabanga, Bohol. The mapped surface of NBF is 6 kilometres (3.7 mi) long from barangay New Anonang in Buenavista to barangay Napo in Inabanga and generally trends 40 degrees northeast and dips at 50 degrees southeast. The team continues to map its probable extension of NBF northeast of Inabanga towards Getafe and southwest towards Loon and Maribojoc.
The longest, continuous individual trace mapped by the team is approximately 2 kilometres (1.2 mi) in Anonang. In this barangay, surface rupture trends 40 degrees northeast. The surface rupture manifested as prominent fault scarps, which range from 2 metres (6 ft 7 in) to 5 metres (16 ft) of vertical displacements. Other geomorphic manifestations observed in Anonang include 2.5 metres (8 ft 2 in) vertical displacement of Cawasan Creek in Sitio Calubian, producing a small waterfall at the point where the fault transects the creek. Other typical features associated with reverse faulting, such as scallops, bulges and warps, were also observed in the deformation zone, which extended as wide as 30 metres (98 ft) in some places.
Aftershocks continue to rattle Bohol Island and Cebu. As of 6 December 4,026 aftershocks were recorded, 114 of which were felt. Included in the aftershocks are the 5.3 magnitude tremor experienced at 12:59 a.m. on October 26, and another 4.8 magnitude quake at 1:28 p.m. on November 12, centered at San Isidro, Bohol.
The Pacific Tsunami Warning Center did not issue a Pacific-wide tsunami threat. The United States Geological Survey issued a yellow warning, saying "some casualties and damage are possible and the impact should be relatively localised. Past yellow alerts have required a local or regional level response." SHOA, of the Chilean Navy, stated the earthquake would not affect national or South American coasts.
Casualties and infrastructure damage
The earthquake struck as the Philippines was observing the Muslim holiday of Eid-al-Adha. The public holiday had closed schools, some businesses, and offices which helped reduce the number of casualties.
A total of ₱2.25 billion worth of damage to public buildings, roads, bridges, and flood controls was reported in Bohol and Cebu. A total of 671,103 families or more than 3.2 million people were affected by the quake. Out of the total number of affected, 71,822 families or more than 348,000 people were displaced.
By far the most casualties and damage occurred in Bohol. A total of 209 people were confirmed dead, 877 people were confirmed injured, and 8 confirmed missing. A rough estimate of the damage is expected to be at least at ₱2.2 billion. The town of Loon had the largest number fatalities (67). Also, a total of 1,255,128 people (the province's entire population) were affected by the quake. Nearly 71,900 residential houses were damaged (out of which 14,480 were totally destroyed), with the towns of Loon, Tubigon, Carmen, and Calape among the worst affected.
A building at the Tagbilaran Port Terminal and a ceiling of the second floor and the airport tower of Tagbilaran Airport in Tagbilaran collapsed. Loboc Church, Loon Church and Maribojoc Church collapsed; the façade of Baclayon Church and its bell tower were totally damaged. Other churches, including those in Loay, Dauis, Dimiao, and Tubigon were also severely damaged. In Carmen, a freestanding bell tower and an observation deck in the island's renowned Chocolate Hills were destroyed, with some hills themselves damaged by landslides.
Several government buildings and numerous schools in the province were also partially or totally damaged, including the municipal halls of twelve towns. The provincial district hospital in Loon collapsed, trapping and killing an unknown number of patients.[clarification needed] Some 32 bridges, including many along the National Road, and 13 road sections were damaged and impassable, hampering aid efforts. Energy services in the province were also cut off.
Intensity 7 to 8 was experienced at Metro and Southern Cebu, while the rest of Cebu experience intensity 6 to 7. 12 people were confirmed dead, 96 people injured, and a total of 404,107 families or more than 1.9 million people were affected by the quake.
Several structures in Cebu City incurred total and partial damage. A building in Pasil Fish Port in Cebu City collapsed killing five people and injuring seven people. The Basilica Minore del Santo Niño's bell tower also collapsed. Cebu Provincial Capitol was badly hit by the quake. Several hospitals such as Cebu Doctors' University Hospital and St. Vincent Hospital incurred damage. A stampede in a Cebu gym caused five deaths and injured eight. A part of Mandaue City Public Market also collapsed, reportedly killing a vendor.
Other Visayas islands
Intensity VI was recorded in Hinigaran, Negros Occidental; intensity V in Iloilo, La Carlota, Guimaras, Abuyog in Leyte, and Sibulan in Negros Oriental; intensity IV in Roxas City, Masbate, Bacolod, Bulusan in Sorsogon, Patnongon and San Jose in Antique, Tacloban, Hinunangan, Baybay, Bato and Tabon in Leyte, and Saint Bernard, Maasin and Macrohon in Southern Leyte; intensity II in Borongan in Samar, Laon in Antique; Intensity I and II at various towns in Aklan.
In Negros Occidental, several private buildings incurred damage. In Iloilo, the administration office of Iloilo Airport was slightly damaged. In Siquijor, one person had died and three people were injured from the quake. Two people, one from Negros Oriental and one from Iloilo, were also injured.
The quake was felt in intensity V in Cagayan de Oro and Gingoog in Misamis Oriental; intensity IV in Butuan; intensity III in Davao City, Cotabato, Zamboanga, Surigao, Bukidnon, and in Zamboanga del Norte; intensity II in Tacurong but no people were reported dead. There were no casualties, and damage to properties and infrastructures in Mindanao.
Several flights from Cebu and Bohol airports and the airport operations itself were put on hold as response to check the safety status of the airport buildings. Mactan International Airport in Mactan was later opened before midday, flights between Manila and Bohol were delayed due to temporary suspension of operations in Tagbilaran Airport for about 3 hours. By October 17, all operations of seaports in Bohol and Cebu were back to normal.
Many Bohol residents were left without adequate safe drinking water and sanitary facilities after the quake. Consequently, serious public health issues arose such as cases of diarrhea and water-borne diseases. Worst affected were the municipalities closest to the epicenter, such as Sagbayan, San Isidro, Calape, Tubigon, Clarin and Catigbian.
There were also threats to public health. Community health centers and hospitals were rendered useless, resulting in the use of makeshift wards outside the affected buildings. Food supply was also disrupted with many markets unable to operate a week after the quake. Furthermore, prolonged periods of aftershocks forced the population to take residence in makeshift shelters, afraid to go inside weakened buildings, and causing psychological trauma.
Power and water supply
One in every five households in Bohol had electrical power disruption a week after the earthquake hit. In terms of number of barangays, according to the Department of Energy, 91 percent of 602 villages had their power restored. On October 24, Tagbilaran City was the only town in the province where energy was fully restored. By 3 November nearly all electrical power had been restored.
By 20 October the water supply in 42 towns of Bohol was restored but the towns of Calape, Cortes, Loon, Maribojoc, and Sagbayan still had a problem with their water supply.
As a result of Super Typhoon Haiyan (Yolanda), the province of Bohol suffered another round of power outages since the main source of electricity comes from a power plant in Leyte. This power plant, along with transmission lines, were damaged by the storm. Massive brownouts and blackouts lasted for several weeks, even affecting the water supply. Electrical power was restored to all municipalities by November 23.
Postponement of 2013 barangay elections in Bohol
On 16 October 2013, the provincial government of Bohol asked to the Commission on Elections (COMELEC) for the postponement of the barangay elections after the province was heavily devastated by the quake. The following day, Bohol governor Edgar Chatto announced during the Presidential visit that the provincial board will submit a resolution to the COMELEC postponing the 28 October elections. The same day COMELEC visited the province and evaluated the safety conditions of polling centers. On 22 October COMELEC officially announced the postponement of elections in Bohol citing safety issues and the integrity of the buildings being used as polling centers. The elections in the province was rescheduled on 25 November and synchronized with the affected barangays of Zamboanga City, which was affected by the armed conflict against the Moro National Liberation Front on 9 to 28 September 2013.
Government response and aid
States of calamity were issued by Cebu and Bohol provincial governments on 15 October. The National Commission for Culture and the Arts, National Historical Commission of the Philippines, and the National Museum have expressed their commitment to rehabilitate the ten heritage churches damaged by the quake. Many of the churches destroyed are iconic and are historical landmarks. One was the Basilica Minore del Santo Niño which is the oldest church in the Philippines. PHIVOLCS continuously monitors the geological activity of the region. The Philippine National Police declared a full alert status and deployed 271 personnel and 27 vehicles in Bohol and Cebu and has continuously monitored the effects of the earthquake. The Armed Forces of the Philippines coordinated with local governments and provincial disaster management units for updates on the situation and for damage assessments. The Department of Health placed the affected region into code red alert status. On October 16, the regional consular office of the Department of Foreign Affairs in Cebu suspended its operations in order to inspect for damage at its offices. All services will resume once public safety is ensured.
Philippine President Benigno Aquino III visited the provinces of Cebu and Bohol on 16 October, and assessed the damage caused by the quake. Minutes upon his arrival in Tagbilaran, Bohol, a 5.1 magnitude aftershock occurred.
The Department of Social Welfare and Development released ₱10 million for the purchase of relief goods for displaced families. The Department is planning to distribute two thousand family packs and 100 rolls of laminated sacks which will be airlifted by the Philippine Air Force's C130. It has allocated ₱98 million (US$2.2 million) in standby funds.
As a post-earthquake effect, several local businesses and tourist resorts had a very difficult time in the months after the earthquake, caused by fear from tourists that such event might occur again. After a year, positive signs of recovery thrived for Bohol Island amid rehabilitation efforts.
International response and aid
The Spanish government sent messages of sympathy and solidarity to the Philippine government. Spain also cited the damage and destruction of the churches, which they consider as part of their historical heritage during Spanish period of the Philippines. New Zealand's Prime Minister John Key also sent a letter to President Aquino expressing their heartfelt sympathies to the people affected by the disaster. Canada, through Foreign Minister John Baird, also offered sympathies and stated that his country is ready to help the Philippines. Japan, through ambassador Toshinao Urabe, wrote a letter to the President extending the people's and government's sympathies to the quake hit victims.
Japan delivered emergency relief goods (150 tents and 485 plastic sheets) worth approximately $383,000 for the victims, and later decided to extend additional assistance of $3.5 million through the International Organization for Migration (IOM), the International Federation of Red Cross and Red Crescent Societies (IFRC), United Nations Children's Fund (UNICEF), and United Nations Development Programme (UNDP). The government of Taiwan has provided funds worth $100,000. Malaysia donated RM100,000 for the children affected by the disaster. The United States, through the US Agency for International Development (USAID), donated $50,000 worth of non-food relief items and 6,000 hygiene kits. The South Korea government donated $300,000 of funds to help rehabilitate the provinces of Bohol and Cebu. On October 21, the German government extended their sympathies to the people of the Philippines affected by the disaster. The German government also pledged ₱13.7 million and will be coursed through German humanitarian organization Johanniter-Unfall-Hilfe. On October 25, the Australian Government will provide of ₱124 million funds to the quake hit areas for humanitarian needs. ₱44 million will be funded for family survival kits containing sleeping mats, mosquito nets and water containers direct from the Philippine Red Cross, rice direct from the World Food Programme, and kits for women direct from United Nations Population Fund.
Aid from organizations
The United Nations' World Food Programme has prepositioned a thousand metric tons of rice, 15 metric tons of high energy biscuits and other non-food items to the affected areas in the provinces of Bohol and Cebu. The Association of Southeast Asian Nations' Coordinating Center for Humanitarian Assistance has also delivered relief supplies to Bohol. Philippine Red Cross (PRC) donated relief operations, and deployed volunteers and rescue teams to the depressed areas. Singapore Red Cross (SRC) donated $100 thousand worth of relief goods, and deployed a team of volunteers in the affected areas on October 18. SRC volunteers also assisted surgeons conducting surgical operations in Tagbilaran City. On October 18, Oxfam International deployed a team of experts in order to assess the health and sanitation conditions in Bohol, and donated 400 water treatment solutions which will be distributed to various health centers of the said province. On October 25, the United Nations called to the international community to raise a $46.8 million of aid to the quake affected areas.
A 10 June 2014 report indicated that Bohol residents impacted by the quake have taken up mushroom farming, for which they are paid in rice, as part of a "Food-For-Work programme implemented in partnership with the Bureau of Fisheries and Agriculture and the Philippine Coconut Authority."
Other charity and fundraising activities
GMA Network's Kapuso Foundation and ABS-CBN's Sagip Kapamilya Foundation aided the victims of the quake by providing relief items such as food and bottled water. A benefit concert called #BangonSugBohol was also held in Cebu. Some private individuals from the least affected Tagbilaran City mobilised and provided aid by distributing relief goods and used clothing. Different local and foreign companies also donated different relief items. Different local religious, civic, and humanitarian groups also conducted relief operations in Bohol.
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