The west valley fault system is an imaginary line marking the area where the different fault systems are located underground and are actively moving from where a big earthquake may originate. Vivienne gulla, abscbn news updated as of jun 22 11. It was estimated that the fault line moves every 400 years and the last huge quake transpired in 1658, which was 357 years ago to be exact. Quick links of the west and east valley fault line maps. The fault contains two major segments, known as west valley fault wvf and east valley fault. List of barangays near the east and west valley fault. Getting your own digital copy is free, but you have to register first before you can download it. This atlas ig also available for download at phivoles. Manila metro rail transit system line 7 mrt line 7 update. Luzon and in surigao fault and compostela valley area in eastern mindanao.
Interactive map for the west and east valley fault line on. Check out the maps and the fast facts to understand the risks and plan how to survive when a strong. Lowres version due to high public demand, phivolcs has allowed gma news online to share a. The mainshock and majority of aftershocks may have occurred on the wasatch fault zone or an unnamed fault on the west side of salt lake valley. Ang pag galaw ng west valley fault ang sinasabi nilang the big one kung saan tinatayang 7. Recent trench studies have shown that the west valley fault tends to rupture simultaneously with the wasatch fault, compounding issues such. Click here to download the valley fault system atlas from the phivolcs website. The evf is about 10km long and traverses the municipalities of rodriguez and san mateo in rizal province. Salt lake city could see bigger earthquakes live science. New site lets you calculate distance from fault lines. West valley fault running through bulacan, rizal, metro manila, cavite, and laguna.
Seismologist said that once the west valley fault line moved, it can lead to the eruption of taal volcano just what happened in june 1990 earthquake when the central philippine fault moved. It might be impossible to predict when the next earthquake may occur but scientists can pin down what is called a recurrence interval. The valley fault system atlas office of civil defense. Active fault lines in the philippines roiden fredrich. Salt lake city earthquake faults including wasatch fault zone, west valley fault zone, east great salt lake fault zone, southern oquirrh mountains fault zone, east canyon fault, and utah lake faults. On the west end of salt lake valley is another fault zone called the west valley fault zone that spans 9 miles 16 km northnorthwest.
To the west, in urban salt lake city, a 4milewide 6 km zone of fault segments called the west valley fault zone stretches northnorthwest for 9 miles 14 km beneath the valley. The west segment, known as the west valley fault wvf is one of the two major fault segments of the valley fault system which runs through metro manila to the cities of marikina, quezon city, pasig, makati, taguig and muntinlupa and moves in a dominantly dextral strikeslip motion. If you live in the national capitol region then you need to know this. This web app is a product of the joint collaboration between the philippine institute of volcanology and seismology phivolcs, philippines and geological survey of japan gsj, japan. Download the newly updated phivolcs west valley fault line. Prepare for the big one dost makes valley fault atlas. What dangers await when the west valley fault moves. It is very important to understand where these lines are to understand the level of impact it may bring if your location is in the line.
There are five active fault lines in the country namely the western. Valley fault systemgeneral metro manila area atlas. Check out the maps and the fast facts to understand the risks and plan how to survive when a strong quake shakes metro manila and surrounding. No segment of the metro manila subway project would run over the west valley fault, the philippine institute of volcanology and seismology phivolcs has assured the. East valley fault running through rizal, and the west valley fault. The product of two years of work by a small team of phivolcs geologists, the 120page book titled valley fault system in greater metro manila areas atlas has a total of 33 maps for the 19. Some of the more recent aftershocks cluster in a small zone about 3 miles east of the main area of aftershocks, and these appear to be related to movement of the west valley fault zone. These schools must immediately evacuate the premises in case of an earthquake due to the possibility of collapse when the dextral slipstyle fault collides during movement. Phivolcs valley fault system atlas is the culmination of over two years. The valley fault system in greater metro manila area atlas as of. The marikina valley fault system, also known as the valley fault system vfs, is a. Affected areas were parts of quezon city, makati, pasig, taguig, bulacan, marikina, and muntinlupa in metro manila. Marikina valley fault system west valley fault east valley.
Disaster officials say detailed maps showing danger zones will help metro manila and surrounding provinces prepare for a 7. Pdf barangays and buildings traversed by the valley fault system. The most significant, historic earthquake zone geological fault in the philippines is located just 10km east of manila city and is known as the marikina valley fault system or, frequently, marikina fault. This is an official map and data, as such it is the most reliable information we have. Evaluating the seismic relation between the west valley. This arcparallel, leftlateral strike slip fault is divided into several segments and has been the source of largemagnitude earthquakes in recent years, such as the 1973. The vfs is an active fault system composed of two fault segments.
The vfs was unveiled on may 18, 2015 at the institutes auditorium, quezon city to spread awareness on west valley fault which could possibly generate a magnitude 7. Like the wasatch fault zone, the west valley fault zone shows evidence of recurrent movement in the geologically recent past i. Phivolcs launch map, valley fault system to guide users. Bandibas of gsj with the cooperation of the research and development personnel of phivolcs. Phivolcs deputy director bartolome bautista said the fault, which runs from the sierra madre mountain range to tagaytay, moves every 200 to 400 years. Local government units and the communities along the 100kilometer west valley fault system may now get a clearer picture of the risks they face in the event of a powerful earthquake after the philippine institute of volcanology and seismology phivolcs yesterday distributed an atlas showing in detail areas traversed by the major fault line. Makikita nyo sa unang larawan na may dalawang fault line. Geologists have dug a 150foot trench by salt lake city international airport to study the taylorsville west valley city fault, and its rock samples will help scientists forecast when the next major earthquake could erupt along the wasatch fault. The 1,200kmlong philippine fault zone pfz is a major tectonic feature that. The philippine institute of volcanology and seismology phivolcs launched an application or tool, aiming to help its users to check if their homes can are located. A high resolution copy of the atlas is available for free download upon registration from the phivolcs website.
West valley fault line update, quezon city, philippines. Researchers studying taylorsville west valley city fault to better understand quake conditions in utah. Phivolcs maps of marikina fault line affected areas phivolcs is calling all owners of buildings and structures located on or near the marikina fault, which is now officially named as west valley fault, to be prepared as an earthquake may strike along marikina fault at any time. Valley fault system trace by phivolcs, 2015 and processed. Over 400 makati homes must move away from fault line. The valley fault system vfs, an active fault in the greater metro manila area gmma, consists of two segments. Thus, the publication of the valley fault system vfs atlas, a handbook of largescale maps detailing the situs of the 100kilometerlong west valley and the 10ki ometerlong east val ey segments of the vfs in the metro luzon urban be tway super reg on, is a welcome and significant.
According to phivolcs, the latest activity of marikina fault. The philippine institute of volcanology and seismology on wednesday said the west valley fault line, supposedly capable of producing a 7. Fault straddles 10 kilometers in rizal province while the west valley fault. A few days ago, we posted an article that shows the different areas where the east valley fault and west valley fault run. West valley and the 10kilometerlong east valley segments of the vfs in the metro luzon. Phivolcs says subway project runs parallel but not on fault line. This fault roughly moves between 400600 years and the last earthquake in this fault was recorded on 1658 or 357 years ago. But unlike the wasatch fault zone, which has been the subject of dozens of detailed scientific studies, relatively little is known about the behavior of the west valley fault zone. Schools on top of the west valley fault line there are about 19 schools, colleges, and universities that are on the west valley fault line to which 29 of their buildings are directly constructed on top of the fault line. Devastating faults of the big one inquirer business.
Download and install the free app from the app store. The west valley fault zone is separate from, but related to the wasatch fault zone, which is the regions preeminent fault and lies at the base of the wasatch range. Thus, the publication of the valley fault system vfs atlas, a. The valley fault system atlas read online for free. Gaano ba kahanda ang gobyerno at ang mga residenteng nakatira. A page of phivolcs valley fault system atlas shows the part of the west valley fault near pasig city subdivisions valle verde. Wasatch fault zone map salt lake city and utah faults map. The 1,200kmlong philippine fault zone pfz is a major tectonic feature that transects the whole philippine archipelago from northwestern luzon to southeastern mindanao. List of barangays in metro manila, nearby province located. Barangays and buildings traversed by the valley fault. Valley fault system launched by phivolcs phivolcs launched a map or a valley fault system vfs atlas to help the individual to determine if their location is located in the fault. High resolution west valley fault maps launched rappler. Ang maladelubyong senaryong ito ay ang posibleng bunga ng paggalaw ng west valley fault. Sa metro manila, apatnaput dalawang baranggay sa mga lungsod ng quezon city, marikina, pasig, makati, taguig, at muntinlupa ang nasa west valley fault.
Geologists sample taylorsvillewest valley fault line to. Valley fault system vfs in the philippines, is a dominantly dextral strikeslip fault system that extends from dingalan, aurora in the north and runs through the cities of quezon, marikina. Based on a 2014 survey conducted by the makati city government, the 3kilometerlong portion of the west valley fault in the city passes through four barangays. The volcanology agency has previously warned the impending activity of the west valley fault. The west and east valley fault system span from angat, bulacan all the way down to carmona, cavite and calamba, laguna and is the most feared event that could hit metro manila in case the fault system moves as it may cause larger than 7. The phivolcs faultfinder map displays all the different faults located in the philippines, in particular, the valley fault system or vfs formerly known by its inaccurate label marikina fault line. Though this painted a clear picture for most, others still want to know just exactly how near or far they are from the fault lines. The west valley fault will not move because of the magnitude 6.
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