The Valley Fault System and formerly as the Marikina Valley Fault System is a group of dextral strike-slip[1] fault which extends from San Mateo, Rizal to Taguig City on the south; running through the cities of Makati, Marikina, Parañaque, Pasig and Taguig.[2] The fault possesses a threat of a large scale earthquake with a magnitude of 7 or higher[3][4] within the Manila Metropolitan Area with death toll predicted to be as high as 35,000[3][4] and some 120,000 or higher[3] injured[4] and more than three million needed to be evacuated.[5]
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The fault contains two segments, known as West Valley Fault and East Valley Fault both located in the city of Marikina.
The west segment, known as the Western Marikina Fault was one of the two fault segments of the Valley Fault System which runs through the cities of Marikina, Pasig and Muntinlupa[5] and moves in a dominantly dextral strike-slip motion.[1] The West Fault is capable of producing large scale earthquakes on its active phases with a magnitude of 7 or higher.[5]
The eastern segment, known as Eastern Marikina Fault moves in an oblique dextral motion.[1] ......
