What type of fault is the West Valley fault?
dextral strike-slip motion
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 strike-slip motion.
When was the last time West Valley Fault move?
The West Valley Fault last moved in 1658, and experts warn that a major quake along the fault could kill 50,000 people if residents are caught unprepared.
Is West Valley Fault still active?
The fault, which has moved 4 times in the last 1,400 years, moves roughly every 400 years, according to Phivolcs Director Renato Solidum. The last major earthquake generated by this fault was in 1658, or 357 years ago.
What are the places included in West Valley Fault?
The West Valley Fault is 100 kilometers in length and traverses the cities of Metro Manila namely Taguig, Muntinlupa, Paranaque, Quezon City, Pasig, Makati, and Marikina as well as nearby provinces of Rizal, Laguna, Cavite, and Bulacan.
Where does the West Valley Fault start and end?
But the strong push and pulls were felt to 100 kilometers away, along the broad curve of the 146-kilometer West Valley Fault, which starts from Bulacan in the north and runs through the provinces of Rizal, the Metro Manila cities of Quezon, Marikina, Pasig, Makati, Taguig and Muntinlupa, and the provinces of Cavite and …
What will happen if the West Valley fault moves?
The study’s worst-case scenario indicated that a 7.2-magnitude earthquake caused by the movement of the West Valley Fault will cause 40 percent of all residential buildings, and 35 percent of public facilities such as schools and hospitals, to collapse or be heavily damaged.
How far from West Valley Fault is safe?
But first, what is considered a safe distance from a fault line? PhiVolcs recommends avoiding construction within five meters on each side of a fault trace. This is equivalent to a total width of 10 meters. This is considered the ideal “10-meter wide no-build zone” in the vicinity of a fault.
What are the dams near the West Valley fault?
Since Angat Dam sits along the West Valley Fault, this fault can move anytime and trigger a 7.2-magnitude earthquake.
What is the longest fault line in the Philippines?
The 1,200-km-long Philippine fault zone (PFZ) is a major tectonic feature that transects the whole Philippine archipelago from northwestern Luzon to southeastern Mindanao.
What year will the Big One hit?
According to USGS there is a 70% chance that one or more quakes of a magnitude 6.7 or larger will occur before the year 2030.
What do we know about the West Valley Fault Zone?
Like the Wasatch fault zone, the West Valley fault zone shows evidence of recurrent movement in the geologically recent past (i.e., the past 10,000 years). 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.
What is the history of the Marikina Valley Fault?
The Marikina Valley Fault System is considered to be almost fully locked, i.e. almost no movement, so the pressure is building all of the time; historic records suggest that it has slipped with a jolt every 200-400 years (310 years on average). The last noticeable jolt within the Marikina Valley Fault System is reported to have been in 1771AD.
How dangerous is the Wasatch Fault Zone?
The Wasatch fault zone has long been known to be a serious earthquake threat to the Wasatch Front region. In Salt Lake Valley, strands of the Salt Lake City segment of the fault zone pass directly through Utah’s capital city.
Where is the fault line in Utah?
In Salt Lake Valley, strands of the Salt Lake City segment of the fault zone pass directly through Utah’s capital city.