It is a well-chronicled fact that the Philippines lies on what is called the Pacific Ring of Fire, geologic location where most earthquakes on Earth take place. However, less is known about which areas lie directly along the West Valley Fault and East Valley Fault in Greater Metro Manila.
Intending to make people aware rather than drive scared folks out of their minds, Rappler compiled this list along with map locations on these subdivisions and villages the fault line is defined.
Studies show that residential buildings will suffer the most damage during a 7.2-magnitude earthquake because many of them do not follow building standards. So if you happen to live within the defined areas listed below, take extra precaution to ensure safety in case the so-called Big One will ever happen.
“Everyone must learn from the recent effects of the magnitude 6.7 earthquake in Surigao del Norte. If a similar event happens in a highly urbanized area, the effects can be more devastating,” Phivolcs director Renato Solidum warned.
What is West Valley Fault
West Valley Fault is a geological fault system located in the Philippines. This is a major active fault system that runs for approximately 100 kilometers across several cities and provinces on Luzon Island. Known as the Marikina Valley Fault System, the West Valley Fault is one of the most significant fault systems in the Philippines.
The West Valley Fault is a strike-slip fault, which means that both sides move horizontally past each other. The fault has the potential to generate large earthquakes with a magnitude of 7.2 or higher, which could result in significant property damage and the loss of lives. Based on the location and geological characteristics of the West Valley Fault, the Philippine Institute of Volcanology and Seismology (PHIVOLCS) has identified several subdivisions, all considered highly active and highly susceptible to earthquake damage.
The Philippine government has taken several measures to mitigate the effects of potential earthquakes posed by the West Valley Fault, including creating hazard maps, enforcing building codes, and regular earthquake drills and preparedness campaigns, among others.
Subdivisions Located within West Valley Fault
- Amity Ville
- Christine Ville
- Loyola Garden Village
- Loyola Subdivision
- Monte Vista Village
- Industrial Valley Subdivision
- Cinco Hermanos Subdivision
- Wood Crest Subdivision
- Sunnyside Heights Subdivision
- Doña Anna Village
- Filinvest Homes II and Villa Amor Uno
- Northview Subd
- Loyola Grand Villas
- White Plains Subdivision
- Queensville Court
- Blue Ridge B
- Valle Verde 6
- Valle Verde 5
- Valle Verde
- Valle Verde 3
- Valle Verde 1
- Kawilihan Village
- East Rembo
- Pinagsama Phase II
- Pan-Am Village
- North Signal Village
- Central Signal Village
- South Signal Village
- Maharlika Village
- Camp Bagong Diwa
- Posadas Village
- Solid Mills Village
- Embassy Village
- Liberty Homes
- Carmina Compounds
- L&B Subdivision and Compound
- UP Side Subdivision
- Country Homes Alabang
- Planas Ville
- Camella Homes Alabang 3
- Country Homes Subd and Jose Marey Subdivision
- Camella Homes
- Susana Heights Village 1
- Susana Heights Subd Phase I
- St Anne Homes
- Real Ville Subdivision
- Adelina 1A Subdivision
- GSIS Village
- Elnor Homes
- Sampaguita Village
- United San Pedro Subdivision
- Wedgewoods Subdivision
What should I do if I live in one of the subdivisions above?
If your place is located within the West Valley Fault in the Philippines, it is important to ensure your safety and be prepared for potential earthquakes. Here are some things you can do:
- Familiarize yourself with the West Valley Fault and its potential risks. Learn about the warning signs of earthquakes and what to do during an earthquake.
- Make sure that your home and workplace are structurally sound and earthquake-resistant. Consult with a professional engineer or architect to assess the safety of your building and retrofit it if necessary.
- Prepare an emergency kit with basic supplies such as food, water, first aid kit, flashlight, and extra batteries. Keep your kit in an easily accessible place.
- Have an emergency plan and conduct regular earthquake drills with your family, household, or workplace. Know where to evacuate in case of an earthquake and designate a meeting place.
- Stay informed and be vigilant. Listen to official announcements and updates from local authorities and emergency response teams.
By taking these steps, you can be better prepared for potential earthquakes along the West Valley Fault and increase your chances of staying safe in the event of an earthquake.
Where are the other earthquake faults in the Philippines?
The Philippines also has several other significant fault areas in addition to the West Valley Fault. Among them are:
The Eastern Mindanao Fault runs approximately 200 kilometers in eastern Mindanao and can generate earthquakes up to magnitude 7.2.
The Central Philippine Fault system extends approximately 1,200 kilometers from the northern part of Luzon Island to the southern part of Mindanao Island. An earthquake of magnitude 7.8 or greater may be generated by it.
The Manila Trench is a subduction zone off Luzon Island’s western coast. Large and destructive earthquakes and tsunamis can occur in the Manila Trench.
Located offshore from Negros Island, the Negros Trench is another subduction zone. In addition to producing earthquakes up to magnitude 7.9, it can generate volcanic eruptions.
In the Cotabato Trench, a subduction zone located offshore of Mindanao, earthquakes can occur with magnitudes as high as 8.2.
For residents who live close to fault lines, it is crucial to take earthquake safety seriously and be prepared for the possibility of an earthquake. Being informed, prepared, and taking preventative measures can help reduce the risk of injury and damage in an earthquake.
This includes familiarizing oneself with the fault lines and their potential risks, checking if their area is located in a hazard zone, ensuring that their home or workplace is structurally sound and earthquake-resistant, and preparing an emergency kit and plan. Additionally, staying informed and up-to-date with official announcements and updates from local authorities and emergency response teams can help residents better prepare for and respond to an earthquake.
Ultimately, taking the necessary steps to prepare for an earthquake can help keep residents safe and aid in the overall resilience of communities and the country as a whole.
Related: Guide to Property Investments in Earthquake Prone Areas in the Philippines