The Philippine Institute of Volcanology and Seismology (PHIVOLCS), has launched a handy reference called “The Valley Fault System Atlas”
“The Valley Fault System Atlas” shows a map or places where active valley fault are can be find in Greater Manila Area or GMA and other nearby provinces.
Due to uncertainty on where or when a strong earthquake will hit Philippines, especially GMA? in which PHIVOLCS, believe that a magnitude of 7.2 is about to happen and will hit Metro Manila.
The key to reduce the risk of a strong earthquake is to know what are the area of active valley fault, so that people living in that area will have the knowledge to prepare and what to do in case of a strong earthquake happen.
That’s why PHIVOLCS, released “The Valley Fault System Atlas”, in this reference you will see a clearer and much detailed area of active valley faults, where the valley fault is the main source of an earthquake.
According to Dr. Renato Solidum, Jr., director of the Philippine Institute of Volcanology and Seismology (PHIVOLCS). In preparedness of strong earthquake, people must know what area is the most active faults in GMA , people must not built houses, building and other infrastructure under the active valley fault , and also to give knowledge and preparedness of knowing what to do in case of a strong earthquake.
Base on Valley Fault System Atlas, there are two fault segment in Metro Manila, East Valley Fault, is a 10 kilometer fault cruising from Rodriguez, Rizal and San Mateo, Rizal. In case of sudden movement , it will cause a magnitude of 6.2.
On the other hand the second segment of fault is the West Valley Fault, a 100 kilometers fault which is cruising from Bulacan, Rizal, Quezon City, Marikina, Pasig, Makati, Taguig, Muntinlupa, up to some provinces of Laguna and Cavite. If the fault becomes active it will give a earthquake of magnitude of 7.2.
The “The Valley Fault System Atlas”, was also given in local government and was believe that it took 3 years to finish the said reference. It is also downloadable in the main website of Phivolcs.