Marikina Valley Fault System Map: Are you living in an earthquake zone?

Where is the Marikina Fault?

The Marikina Fault Line: What you need to know

The recent devastating earthquake in Nepal that killed thousands of people has been in the news lately, and there has been renewed interest in earthquake preparation and a reminder on what to do if it happens here.

Relief Map of Metro Manila and nearby provinces showing the West and East Valley Fault Line by Wikipedia
Relief Map of Metro Manila and nearby provinces showing the West and East Valley Fault Line by By Ervin Malicdem (Own work) [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC BY-SA 4.0 (http://creativecommons.org/licenses/by-sa/4.0)], via Wikimedia Commons

In the Philippines, the most recent deadliest earthquake we’ve had was in 2013, where a 7.2 quake that hit Bohol and Cebu in October left over 200 people dead and damages to property amounting to at least P2 billion.

In Metro Manila, the Philippine Institute of Volcanology and Seismology (Phivolcs) watches the Marikina Valley Fault System. Also known as Marikina Valley Fault or West Valley Fault, this is a fault system that runs through major cities in the metro and nearby provinces.

Among them are the following: Norzagaray and San Jose Del Monte City in Bulacan, Rodriguez in Rizal, Quezon City, Pasig City, Taguig City, Muntinlupa City, San Pedro, Cabuyao, Calamba and Sta. Rosa in Laguna, and Carmona, Silang and General Mariano Alvarez in Cavite.

Phivolcs said the fault, capable of a large-scale earthquake of magnitude 7 or higher, is “ripe for movement” and can strike anytime in the next few years.

It also released a hazard map showing exactly where the fault passes through and has identified key areas where residential villages, hospitals, and schools are located directly over the valley fault.

West Valley and East Valley Fault Map
West Valley and East Valley Fault Map

Some of the larger residential villages identified are Loyola Subdivision and Cinco Hermano Subdivision in Marikina; Filinvest Homes II, White Plains Subdivision, and Greenmeadows in Quezon City; the Valle Verde Villages in Pasig City; and Camella Homes in Muntinlupa.

Marikina Fault on Google Map

Where is the Marikina Valley Fault?

The Valley Fault System extends from Doña Remedios Trinidad, Bulacan in the north. It runs through the provinces of Rizal and the Metro Manila cities of Quezon, Marikina, Pasig, Makati, Taguig, and Muntinlupa, and the provinces of Cavite and Laguna that ends in Canlubang.

What to do if your home is near a fault?

For residents whose homes are near the identified areas of Phivolcs, the chief reminder is not to panic. Many of the houses are not located precisely above the fault line; they may experience intense vibrations and shake during an earthquake, but they are at risk just as much as the other houses in Metro Manila.

The best thing to do is have an engineer check out your house’s structural integrity or any structure to make sure it is earthquake-ready.

What to do before, during, and after the “Big One”?

Phivolcs released a list of things to do before, during, and after an earthquake. The best preparation is to keep these things in mind to know what to do when a large quake strikes.

Before:

  • Identify the earthquake hazards in your area.
  • Strap or bolt heavy furniture or cabinet to the walls
  • Check the stability of hanging objects like ceiling fans and chandeliers.
  • Breakable items, harmful chemicals, and flammable materials should be appropriately stored on the lowermost secured shelves.

During:

  • Stay calm. When you are inside a structurally sound building or home, stay there. Do the “duck, cover, and hold.”
  • If possible, quickly open the door for exit.
  • Duck under a sturdy desk or table, and hold on to it, or protect your head with your arms
  • Stay away from glass windows, shelves, cabinets, and other heavy objects.
  • If you’re outside, move to an open area. Stay away from trees, power lines, and concrete structures.
  • Move away from steep slopes that may be affected by landslides.

After

  • Be prepared for aftershocks. Once the shaking stops, take the fastest and safest way out of the building.
  • Don’t use elevators or enter damaged buildings.
  • Check yourself and others for injuries.
  • Check water and electrical lines for damages.
  • Check for spills of chemical, toxic, and flammable materials.
  • If you need to evacuate your residence, have a message stating where to bring your emergency supply kit.

The most important reminder is to stay levelheaded during an earthquake. Panic will only worsen the situation. Keep a clear head to know how to best keep yourself and your family in a safe situation.

Frequently Asked Questions:

What are the places included in West Valley Fault?

The West Valley Fault is 100 kilometers in length and traverses the cities of Metro Manila namely Taguig, Muntinlupa, Paranaque, Quezon City, Pasig, Makati, and Marikina as well as nearby provinces of Rizal, Laguna, Cavite, and Bulacan.

What areas are affected by Marikina fault line?

The Marikina Valley Fault System, also known as the Valley Fault System (VFS), is a dominantly right-lateral strike-slip fault system in Luzon, Philippines. It extends from Doña Remedios Trinidad, Bulacan in the north and runs through the provinces of Rizal, and the Metro Manila cities of Quezon, Marikina, Pasig, Makati, Taguig, and Muntinlupa, and the provinces of Cavite and Laguna that ends in Canlubang.

Why is it called the Big One?

The Department of Science and Technology – Philippine Institute of Volcanology and Seismology (DOST-PHIVOLCS) reminds the public that any active faults that have not generated any historical surface-rupturing events have higher potential to generate a large earthquake also known as “The Big One”, which can significantly affect the region and surrounding areas in the Philippines. Hence, everyone should be preparing for it.

What will happen if the big one hits the Philippines?

The “Big One” is a worst-case scenario of an earthquake from the West Valley Fault, a 100-kilometer fault that runs through six cities in Metro Manila and nearby provinces. A tsunami is also foreseen in the scenario set by the Philippine Institute of Volcanology and Seismology (Phivolcs). (Source: PNA.gov.ph)

Want more updates about the Marikina Valley Fault System? Follow #TeamOutofTown, on Facebook, TwitterInstagramBloglovin, and Pinterest for more travel ideas.

Also read: Photos Of Bohol Churches: Before And After The October 15, 2013 Earthquake.

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