Valley Fault System
Encyclopedia
The Valley Fault System and formerly as the Marikina Valley Fault System is a group of dextral strike-slip fault which extends from San Mateo
, Rizal to Taguig City
on the south; running through the cities
of Makati
, Marikina
, Parañaque
, Pasig
and Taguig
. The fault possesses a threat of a large scale earthquake
with a magnitude
of 7 or higher within the Manila Metropolitan Area
with death toll predicted to be as high as 35,000 and some 120,000 or higher injured and more than three million needed to be evacuated.
.
, Pasig
and Muntinlupa
and moves in a dominantly dextral strike-slip motion. The West Fault is capable of producing large scale earthquakes on its active phases with a magnitude
of 7 or higher.
......
San Mateo, Rizal
San Mateo, Rizal is a first class urban municipality of Rizal Province. Located on the island of Luzon, San Mateo is one of 13 municipalities and a capital city that make up the Province of Rizal, Region 4-A of the Philippines. San Mateo is part of the Metro Luzon Urban Beltway...
, Rizal to Taguig City
Taguig City
Taguig is a city in Metro Manila in the Philippines. From a thriving fishing community along the shores of Laguna de Bay, it is now an important residential, commercial and industrial center...
on the south; running through the cities
Cities of the Philippines
A city is a tier of local government in the Philippines. All Philippine cities are chartered cities, whose existence as corporate and administrative entities is governed by their own specific charters in addition to the Local Government Code of 1991, which specifies the administrative structure...
of Makati
Makati City
The City of Makati is one of the 17 cities that make up Metro Manila, one of the most populous metropolitan areas in the world. Makati is the financial center of the Philippines and one of the major financial, commercial and economic hubs in Asia...
, Marikina
Marikina City
Marikina, officially the City of Marikina, known as the Shoe Capital of the Philippines, was former capital of the province of Manila during the declaration of Philippine Independence and one of the sixteen cities within the Manila Metropolitan Area. Marikina is part of Eastern Manila District of...
, Parañaque
Parañaque City
The City of Parañaque , or simply Parañaque , is one of the cities and municipalities that make up Metro Manila in the Philippines....
, Pasig
Pasig City
The City of Pasig is one of the city municipalities of Metro Manila in the Philippines and was the former capital of the province of Rizal prior to the formation of this grouping of cities designated as the National Capital Region...
and Taguig
Taguig City
Taguig is a city in Metro Manila in the Philippines. From a thriving fishing community along the shores of Laguna de Bay, it is now an important residential, commercial and industrial center...
. The fault possesses a threat of a large scale earthquake
Earthquake
An earthquake is the result of a sudden release of energy in the Earth's crust that creates seismic waves. The seismicity, seismism or seismic activity of an area refers to the frequency, type and size of earthquakes experienced over a period of time...
with a magnitude
Moment magnitude scale
The moment magnitude scale is used by seismologists to measure the size of earthquakes in terms of the energy released. The magnitude is based on the seismic moment of the earthquake, which is equal to the rigidity of the Earth multiplied by the average amount of slip on the fault and the size of...
of 7 or higher within the Manila Metropolitan Area
Metro Manila
Metropolitan Manila , the National Capital Region , or simply Metro Manila, is the metropolitan region encompassing the City of Manila and its surrounding areas in the Philippines...
with death toll predicted to be as high as 35,000 and some 120,000 or higher injured and more than three million needed to be evacuated.
Fault segments
The fault contains two segments, known as West Valley Fault and East Valley Fault both located in the city of MarikinaMarikina City
Marikina, officially the City of Marikina, known as the Shoe Capital of the Philippines, was former capital of the province of Manila during the declaration of Philippine Independence and one of the sixteen cities within the Manila Metropolitan Area. Marikina is part of Eastern Manila District of...
.
West segment
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 MarikinaMarikina City
Marikina, officially the City of Marikina, known as the Shoe Capital of the Philippines, was former capital of the province of Manila during the declaration of Philippine Independence and one of the sixteen cities within the Manila Metropolitan Area. Marikina is part of Eastern Manila District of...
, Pasig
Pasig City
The City of Pasig is one of the city municipalities of Metro Manila in the Philippines and was the former capital of the province of Rizal prior to the formation of this grouping of cities designated as the National Capital Region...
and Muntinlupa
Muntinlupa City
The City of Muntinlupa is the southernmost city in Philippine National Capital Region. It is bordered on the north by Taguig City; to the northwest by Parañaque City; by Las Piñas City to the west; to the southwest by the city of Bacoor, Cavite; by the city of San Pedro, Laguna; and by Laguna de...
and moves in a dominantly dextral strike-slip motion. The West Fault is capable of producing large scale earthquakes on its active phases with a magnitude
Moment magnitude scale
The moment magnitude scale is used by seismologists to measure the size of earthquakes in terms of the energy released. The magnitude is based on the seismic moment of the earthquake, which is equal to the rigidity of the Earth multiplied by the average amount of slip on the fault and the size of...
of 7 or higher.
East segment
The eastern segment, known as Eastern Marikina Fault moves in an oblique dextral motion.......
External links
- Interactive illustration of the Valley Fault System. Philippine Institute of Volcanology and SeismologyPhilippine Institute of Volcanology and SeismologyThe Philippine Institute of Volcanology and Seismology is a Philippine national institution dedicated to provide information on the activities of volcanoes, earthquakes and tsunamis, as well as other specialized information and services primarily for the protection of life and property and in...
. - Illustration of Valley Fault System
- Neotectonics study of the Marikina Valley fault system. ScienceDirectScienceDirectScienceDirect is one of the largest online collections of published scientific research in the world. It is operated by the publisher Elsevier and contains nearly 10 million articles from over 2,500 journals and over 6,000 e-books, reference works, book series and handbooks issued by Elsevier...
. - Marikina Fault. United States Geological SurveyUnited States Geological SurveyThe United States Geological Survey is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, and the natural hazards that threaten it. The organization has four major science disciplines, concerning biology,...
.
