Bohol Fault System

Bohol Fault System, or also known as (BFS), is a reverse fault system in Bohol province, Philippines. This fault system contains two segments: the newly found North Bohol Fault following the 2013 Bohol earthquake,[3] and the East Bohol Fault.

Bohol Fault System
Surface rupture of the North Bohol Fault during the 2013 Bohol earthquake at Inabanga, Bohol
Etymology	Bohol
Named by	Philippine Institute of Volcanology and Seismology
Year defined	2013
Country	Philippines
Region	Central Visayas
State	Bohol
Cities	North; Loon, Calape, Inabanga, Tubigon, Buenavista, Clarin, Sagbayan, Getafe, Trinidad East; Loboc, Bilar, Batuan, Carmen
Characteristics
Range	Inabanga & Clarin
Segments	North Bohol Fault, East Bohol Fault
Depth	30 km (19 mi)
Tectonics
Plate	Philippine Sea Plate and Sunda Plate
Status	Active
Earthquakes	1981, 1990, 2013
Type	Reverse fault
Movement	Dextral
Age	Gelasian
Orogeny	Mindanao-Surigao-Davao Orogeny
Volcanic arc/belt	Bohol Corridor

1981

2013

1990

1990

All known recent magnitude ≥ 6.0 M_w in Bohol. In 1981 (6.0 M_w)[1], a doublet in 1990 (6.8 M_w) near Guindulman.[2] and the well-known 2013 Bohol earthquake (7.2 M_w).

The North Bohol fault is located in Inabanga and near Clarin, while the East Bohol fault passes through the SW part of Bohol at Tagbilaran and goes eastwards.

Bohol fault segments

North Bohol fault

North Bohol fault or Inabanga fault is a reverse fault located at Anonang, Inabanga which was found on 15 October 2013 during the Bohol earthquake. Based on Phivolcs, a new fault occurs only once in a century. The North Bohol fault, shaped as a hanging wall and also known as the "Great Wall of Bohol", became one of the tourist attractions in Bohol province.[4][5]

East Bohol fault

The East Bohol fault is a dominantly strike slip fault located at the southern portion of Bohol province, opposite to the North Bohol fault.[6][7]

Bohol earthquake

Main article: 2013 Bohol earthquake

The 2013 Bohol earthquake was a deadly event which happened on 15 October, striking the provinces of Bohol, Cebu, Negros Oriental, Masbate and Leyte. Teresito Bacolcol discovered the new fault in the area of Inabanga and Clarin.

See also

• Chocolate Hills

References

1. "M 6.0 - Bohol, Philippines". United States Geological Survey. Retrieved March 14, 2018.
2. "M 6.8 - Bohol, Philippines". United States Geological Survey. Retrieved March 14, 2018.,
3. Camille Diola (October 23, 2013). "Phivolcs discovers new fault system in Bohol quake". philstar.com. STAR Group of Publications. Retrieved 8 August 2016.
4. "North Bohol fault becomes tourist attraction". news.abs-cbn.com. ABS-CBN Corporation. October 28, 2013. Retrieved 8 August 2016.
5. "Post-earthquake Bohol: Silver lining after the disaster". Department of Environment and Natural Resources. Archived from the original on 25 January 2017.
6. Live Science, Becky Oskin (15 October 2013). "What Caused the Deadly Philippines Earthquake?". Archived from the original on 15 October 2013.CS1 maint: ref=harv (link)
7. Bohol Chronicle, Chito M. Visarra (24 April 2016). "PHIVOLCS warns on quake due to East fault". Archived from the original on 29 April 2016.CS1 maint: ref=harv (link)