10/10/2025
Alam mo ba, ayon sa PHIVOLCS (Philippine Institute of Volcanology and Seismology), mayroong mga mahigit 20 active fault systems sa buong Pilipinas.
✅Luzon
1. Philippine Fault Zone (Luzon segment) – pinakamahaba, umaabot mula Quezon, Rizal, Nueva Ecija, Pangasinan, hanggang Ilocos.
2. West Valley Fault – dumaraan sa Bulacan, Rizal, Metro Manila, Laguna, Cavite.
3. East Valley Fault – nasa silangan ng West Valley Fault, Rizal area.
4. Digdig Fault – bahagi ng Philippine Fault na sanhi ng 1990 Luzon Earthquake.
5. Infanta Fault – nasa Quezon Province.
6. Lubang Fault – sa pagitan ng Batangas at Mindoro Strait.
7.Itbayat Fault – nasa Batanes area.
8. Casiguran Fault – Aurora area.
9. Marikina Valley Fault System – karaniwang tawag sa pinagsamang West at East Valley Faults.
10.Montalban Fault – bahagi rin ng Valley Fault System.
✅Visayas
11. Central Leyte Fault – tumatawid sa Tacloban at Ormoc; aktibo at delikado.
12. North Bohol Fault – sanhi ng 2013 Bohol earthquake.
13. Negros Fault System – nasa Negros Oriental at Occidental.
14. Eastern Samar Fault – malapit sa Pacific trench.
15. Western Panay Fault – Iloilo at Antique area.
✅Mindanao
16 Philippine Fault Zone (Mindanao segment) – isa sa pinakaaktibo, tumatawid mula Surigao hanggang Davao del Sur.
17. Cotabato Fault System – binubuo ng ilang segment tulad ng:
-Makilala–Malungon Fault
-M’lang Fault
-North Columbio Fault
-South Columbio Fault
18. Davao Fault System – dumadaan sa Davao del Norte, Davao City, at Davao del Sur.
19. Tagoloan River Fault – Misamis Oriental area.
20. Sarangani Fault – malapit sa General Santos at Sarangani Bay.
21. Central Mindanao Fault System – kabuuang linya sa Cotabato–Maguindanao–Bukidnon area.