Relief map of Metro Manila and nearby provinces showing the surface traces of the West and East Valley Faults
The fault contains two major segments, known as West Valley Fault (WVF) and East Valley Fault (EVF).
West Valley Fault
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, Taguig and Muntinlupa[1] and moves in a dominantly dextral strike-slip motion.[2] The West Valley Fault segment traverses from Doña Remedios Trinidad to Calamba with a length of 129.47 kilometers (80.45 mi).[1]
The West Fault is capable of producing large scale earthquakes on its active phases with a magnitude of 7 or higher.[3]
East Valley Fault
The eastern segment, known as East Valley Fault (EVF), moves in an oblique dextral motion.[2] It extends to about 17.24 kilometers (10.71 mi) from Rodriguez to San Mateo in the province of Rizal.[1]
Based on kinematic block models that utilize GPS, actual fault geometry, and earthquake focal mechanisms, the West segment of the Marikina Fault was resolved to be almost fully locked, meaning it is currently accumulating and loading elastic strain, at the rate of 10 to 12 mm/yr.[4] The fault possesses a threat of a large scale earthquake with an estimated magnitude between 6–7 and as high as 7.6 [5] to Metro Manila and surrounding provinces with death toll predicted to be as high as 35,000[6][7] and some 120,000 or higher[6] injured[7] and more than three million needed to be evacuated.[3]
99 private villages and subdivisions inside 80 barangays are traversed directly by the fault[8] and endangers 6,331 buildings in a span of 2,964.10 square kilometers (1,144.45 sq mi), to where majority are houses with 19 schools included in the list.[1]
Referencesedit
^ abcdefMalicdem, Ervin (August 16, 2017). "Barangays and Buildings Traversed by the Valley Fault System". Schadow1 Expeditions. Retrieved September 7, 2017. There are about 6,331 structures that are directly above the Valley Fault System within a 10-meter proximity which would be in potential danger of destruction once the slip-fault moves. This sums up to an area of 2,964.10 square kilometers in danger of collapse.
^ abcRimando, Rolly E.; Knuepfer, Peter L.K. (2004). "Neotectonics of the Marikina Valley fault system (MVFS) and tectonic framework of structures in northern and central Luzon, Philippines". Tectonophysics. 415 (1–4): 17–38. doi:10.1016/j.tecto.2005.11.009.
^ ab"'Big One' Is Possible But Metro Is Unprepared". Quezon City, Philippines: Bulatlat. August 14, 2004. Retrieved February 3, 2010. If a major earthquake were to hit Metro Manila today, the devastation would be so big even disaster response authorities cannot simply cope with it. And it even looks like disaster preparedness occupies a low priority among officials down to the municipal level.
^Galgana, Gerald (2007). "Analysis of crustal deformation in Luzon, Philippines using geodetic observations and earthquake focal mechanisms". Tectonophysics. 432 (1–4): 63–87. Bibcode:2007Tectp.432...63G. doi:10.1016/j.tecto.2006.12.001.
^Nelson, Alan R.; Personius, Stephen F.; Rimando, Rolly E.; Punongbayan, Raymundo S.; Tungol, Norman; Mirabueno, Hannah; Rasdas, Ariel (2000). "Multiple Large Earthquakes in the Past 1500 Years on a Fault in Metropolitan Manila, the Philippines". Bulletin of the Seismological Society of America. 90 (1): 84. Bibcode:2000BuSSA..90...73N. doi:10.1785/0119990002.
^ abUbac, Michael (June 20, 2009). "UN to Metro Manila: Ready for Big One?". Inquirer.net. Philippine Daily Inquirer. Retrieved January 30, 2010. Is Metro Manila prepared for the Big One?
^ ab"Big earthquake in Marikina Valley fault line?". Pinoymoneytalk.com. June 20, 2009. Retrieved January 30, 2010. The United Nations is advising the Philippines to be ready for an upcoming big earthquake. A quake with a magnitude of 7 or higher on the Richter scale is sure to hit Metro Manila, they say, but the bigger question is when exactly this will happen.
^Malicdem, Ervin (August 25, 2017). "LIST: 99 Villages and Subdivisions Traversed by the Valley Fault System". Schadow1 Expeditions. Retrieved September 7, 2017.
High resolution West Valley Fault maps launched - Rappler
PHIVOLCS FaultFinder - This web app is a product of the joint collaboration between PHIVOLCS, DOST, GSJ, AIST. It was developed by Dr. Joel C. Bandibas of GSJ with the cooperation of the research and development personnel of PHIVOLCS.
Media related to Marikina Valley Fault System at Wikimedia Commons
April 09, 2024
marikina, valley, fault, system, also, known, valley, fault, system, dominantly, right, lateral, strike, slip, fault, system, luzon, philippines, extends, from, doña, remedios, trinidad, bulacan, north, runs, through, provinces, rizal, metro, manila, cities, q. The Marikina Valley Fault System also known as the Valley Fault System VFS is a dominantly right lateral strike slip 2 fault system in Luzon Philippines It extends from Dona Remedios Trinidad Bulacan in the north and runs through the provinces of Rizal and the Metro Manila cities of Quezon Marikina Pasig Taguig and Muntinlupa and the provinces of Cavite and Laguna that ends in Canlubang 1 Marikina Valley Fault SystemLower and upper fault plain along the West Valley Fault in Carmona CaviteMap of the Marikina Valley Fault Systemshowing relative motion and deformationEtymologyMarikinaNamed byPhilippine Institute of Volcanology and SeismologyYear defined2010Coordinates14 38 N 121 5 E 14 633 N 121 083 E 14 633 121 083CountryPhilippinesRegionCentral Luzon Metro Manila CalabarzonCitiesWest Marikina Quezon City Pasig Taguig Muntinlupa General Mariano Alvarez Carmona Silang San Pedro Binan Santa Rosa Cabuyao CalambaEast Rodriguez San MateoCharacteristicsSegmentsWest Valley Fault East Valley FaultLength146 km 91 mi 1 Displacement10 12 mm 0 39 0 47 in yrTectonicsPlatePhilippine Sea Plate and Sunda PlateStatusActiveEarthquakes1658 citation needed 1771 citation needed TypeStrike slip faultMovementDextralAgeGelasianOrogenyLuzon Mindoro Palawan OrogenyVolcanic arc beltMacolod Corridor Contents 1 Fault segments 2 Threat 3 References 4 External linksFault segments edit nbsp Relief map of Metro Manila and nearby provinces showing the surface traces of the West and East Valley FaultsThe fault contains two major segments known as West Valley Fault WVF and East Valley Fault EVF West Valley FaultThe 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 Taguig and Muntinlupa 1 and moves in a dominantly dextral strike slip motion 2 The West Valley Fault segment traverses from Dona Remedios Trinidad to Calamba with a length of 129 47 kilometers 80 45 mi 1 The West Fault is capable of producing large scale earthquakes on its active phases with a magnitude of 7 or higher 3 East Valley FaultThe eastern segment known as East Valley Fault EVF moves in an oblique dextral motion 2 It extends to about 17 24 kilometers 10 71 mi from Rodriguez to San Mateo in the province of Rizal 1 Threat editSee also List of earthquakes in the Philippines nbsp Buildings traversed by the West Valley Fault Line in Pasig with 5 meter buffer zone doi 10 13140 RG 2 2 31921 07526Based on kinematic block models that utilize GPS actual fault geometry and earthquake focal mechanisms the West segment of the Marikina Fault was resolved to be almost fully locked meaning it is currently accumulating and loading elastic strain at the rate of 10 to 12 mm yr 4 The fault possesses a threat of a large scale earthquake with an estimated magnitude between 6 7 and as high as 7 6 5 to Metro Manila and surrounding provinces with death toll predicted to be as high as 35 000 6 7 and some 120 000 or higher 6 injured 7 and more than three million needed to be evacuated 3 99 private villages and subdivisions inside 80 barangays are traversed directly by the fault 8 and endangers 6 331 buildings in a span of 2 964 10 square kilometers 1 144 45 sq mi to where majority are houses with 19 schools included in the list 1 References edit a b c d e f Malicdem Ervin August 16 2017 Barangays and Buildings Traversed by the Valley Fault System Schadow1 Expeditions Retrieved September 7 2017 There are about 6 331 structures that are directly above the Valley Fault System within a 10 meter proximity which would be in potential danger of destruction once the slip fault moves This sums up to an area of 2 964 10 square kilometers in danger of collapse a b c Rimando Rolly E Knuepfer Peter L K 2004 Neotectonics of the Marikina Valley fault system MVFS and tectonic framework of structures in northern and central Luzon Philippines Tectonophysics 415 1 4 17 38 doi 10 1016 j tecto 2005 11 009 a b Big One Is Possible But Metro Is Unprepared Quezon City Philippines Bulatlat August 14 2004 Retrieved February 3 2010 If a major earthquake were to hit Metro Manila today the devastation would be so big even disaster response authorities cannot simply cope with it And it even looks like disaster preparedness occupies a low priority among officials down to the municipal level Galgana Gerald 2007 Analysis of crustal deformation in Luzon Philippines using geodetic observations and earthquake focal mechanisms Tectonophysics 432 1 4 63 87 Bibcode 2007Tectp 432 63G doi 10 1016 j tecto 2006 12 001 Nelson Alan R Personius Stephen F Rimando Rolly E Punongbayan Raymundo S Tungol Norman Mirabueno Hannah Rasdas Ariel 2000 Multiple Large Earthquakes in the Past 1500 Years on a Fault in Metropolitan Manila the Philippines Bulletin of the Seismological Society of America 90 1 84 Bibcode 2000BuSSA 90 73N doi 10 1785 0119990002 a b Ubac Michael June 20 2009 UN to Metro Manila Ready for Big One Inquirer net Philippine Daily Inquirer Retrieved January 30 2010 Is Metro Manila prepared for the Big One a b Big earthquake in Marikina Valley fault line Pinoymoneytalk com June 20 2009 Retrieved January 30 2010 The United Nations is advising the Philippines to be ready for an upcoming big earthquake A quake with a magnitude of 7 or higher on the Richter scale is sure to hit Metro Manila they say but the bigger question is when exactly this will happen Malicdem Ervin August 25 2017 LIST 99 Villages and Subdivisions Traversed by the Valley Fault System Schadow1 Expeditions Retrieved September 7 2017 External links editValley Fault System VFS Marikina Quadrangle Philippine Institute of Volcanology and Seismology High resolution West Valley Fault maps launched Rappler PHIVOLCS FaultFinder This web app is a product of the joint collaboration between PHIVOLCS DOST GSJ AIST It was developed by Dr Joel C Bandibas of GSJ with the cooperation of the research and development personnel of PHIVOLCS nbsp Media related to Marikina Valley Fault System at Wikimedia Commons Retrieved from https en wikipedia org w index php title Marikina Valley Fault System amp oldid 1192517427, wikipedia, wiki, book, books, library,
