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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. [2] It extends from Doña Remedios Trinidad, Bulacan in the north, running through the provinces of Rizal, the Metro Manila cities of Quezon, Marikina, Pasig, Taguig and Muntinlupa, and the provinces of Cavite and Laguna, before ending in ...
[4] [3] It extends from Davao Gulf in the south, bisects the Caraga region at the Agusan River basin, crosses to Leyte and Masbate islands, and traverses Quezon province in eastern Luzon before passing through Nueva Ecija up to the Ilocos region in northwest Luzon. The northern and southern extensions of the PFZ are characterized by branching ...
Studies conducted by the PHIVOLCS revealed that a large portion of C-5 is built on top of the West Valley Fault. A map of the fault line released on May 18, 2015, shows C-5 in Taguig beside the fault line. [9] The C-5 road is prone to liquefaction. [10]
On Luzon, the fault zone splays out into a number of different faults, including the Digdig Fault. One of the largest historical earthquake on the fault zone was the 1990 Luzon M s 7.8 event that left nearly 2,000 people dead or missing. The same part of the fault zone is thought to have ruptured in the 1645 Luzon earthquake. [7]
The west segment of the Marikina Valley Fault System, the West Valley Fault (WVF) cuts through parts of Muntinlupa [29] and moves in a predominantly dextral strike-slip motion. [30] The West Valley Fault is capable of producing large scale earthquakes on its active phases with a magnitude of 7 or higher. [29]
Of particular concern are signals of massive earthquakes in the region’s geologic history. Many researchers have chased clues of the last “big one”: an 8.7-magnitude earthquake in 1700.
It is bordered on the west by Quezon City, to the south by Pasig and Cainta, to the north by San Mateo, and to the east by Antipolo, the capital of Rizal province. It was founded by the Jesuits on the fertile Marikina Valley in 1630 and the area was called Jesus dela Peña (Jesus of the Rocks) and later on called Mariquina. [5]
A hole in a 600-mile-long fault line has been discovered at the bottom of the Pacific ocean - and it could be the trigger of a magnitude-9 earthquake on the US coast. Just outside of Oregon ...