Taal Volcano lies on the West Valley Fault

“Speak with data,” yesterday’s catchphrase that still carries weight around. My regret was having significant info grab me but let its source slip by, i guess, absent-mindedly.

Without success, i’ve been trying to locate the source of my last post about a geologist who surmised a fatal movement of the West Valley Fault could be triggered by massive volcanic activity from the Taal Volcano.

…To which Phivolcs refuted indirectly as NOT HAPPENING. Its presscon on Youtube:

However, i found solid information from three scientific sources that may partly be basis for the controversial statement of my elusive and missing geologist; as follows:

(on page 5) …Bounding the west side of the valley is the Western Marikina Valley fault (WMVF), which extends an additional 70 km south through metropolitan Manila UNTIL IT BECOMES OBSCURED BY YOUNG VOLCANIC DEPOSITS OF THE TAAL VOLCANO in the Macolod Corridor volcanic zone…
https://www.scribd.com/document/177160353/Expert-Evaluation-of-West-Valley-Fault )

(on page 18) …The MVFS appears to terminate to the south against another tectonic feature, the Macolod Corridor which is a zone of volcanoes related northeast extensional structures that define a rift… THE TRACE OF THE WMVF FARTHER SOUTH OF THE RIDGE, IF IT EXISTS, HAS BEEN BURIED BY YOUNG ERUPTIVE MATERIALS FROM TAAL VOLCANO.
(from https://www.scribd.com/document/131410190/Neotectonics-of-the-Marikina-Valley-Fault-System-MVFS-and-Tectonic-Framework-of-Structures-in-Northern-and-Central-Luzon-Philippines )

At this point, the West Valley Fault can be compared to a long electrical cord that crosses the middle of a room. At the farthest point, the cord slips under a carpet, leaving people guessing whether the cord goes further straight, bends and changes direction or just stops somewhere. But then a source below hits the nail on the head.

(on page 74) …BOTH EARLY AND MORE RECENT INVESTIGATORS SUGGEST that the west Marikina Valley fault may extend south of the Marikina Valley along the west side of Laguna de Bay AS FAR SOUTH AS TAAL LAKE.
(from https://www.researchgate.net/publication/252222140_Multiple_Large_Earthquakes_in_the_Past_1500_Years_on_a_Fault_in_Metropolitan_Manila_the_Philippines )

We could take the side of Phivolcs when it said there is no study that indicates a volcanic eruption can cause tectonic plates to move.

In the same vein, it may be said there is no study yet that will tell if explosive eruptions of the Taal Volcano will not have an effect on the Valley Fault Line right under it. If there is, it may be like a wedge splitting the crack wider.

Maybe now it is time for such study, specially when scientists are realizing there is a possible fault line where a volcano is threatening communities with deadly explosive eruption.

With surprising information that a major fault line may run under an active volcano, it is not enough to announce there is no official study attesting to it yet and, therefore, ignore.

Todate, Taal volcano has had a recorded history of 34 volcanic eruptions in 448 years. Its greatest recorded eruption occurred in 1754, while the last time the dreaded West Valley Fault moved was in 1658, which set the two events 96 years apart. To think, the much-anticipated movement of the West Valley Fault is long OVERDUE, and Phivolcs now is not discounting the 1754 scenario of violent eruption from happening.

If anything, it appears that one is catching up with the other.

Lastly, it appears Phivolcs has known all along that Taal Volcano lies on the West Valley Fault. Please note carefully the illustration with a logo that mentions DOST and PHIVOLCS. To dispel any more doubts, the caption tells it all, with mention of the former Phivolcs head, the late Dr. Raymudo Punongbayan.

Figure III-2. The West Valley Fault extends from Taal Volcano through Laguna, the western edge of Laguna de Bay up to Angat Dam in the north. Modified from Punongbayan (2011).

Source of visual and caption:

POSTSCRIPT: My thoughts on lots of talk about our government to build dedicated evacuation centers nationwide so that when disasters hit, school children will no longer be deprived of their education when schools are used as evacuation centers.

My suggestion is wherever there are vast tracts of idle lands within or in proximity to communities, let the government purchase and develop these lands into NATURE PARKS teeming with carefully planned and planted trees, grass and bushes, with hidden or camouflaged iron poles everywhere with hooks, attachments, or what-have-you for instant installation of giant collapsible tents to temporarily house evacuees. And the park toilets can be constructed to meet the demands of hundreds of evacuees. Maybe we can call these parks BAYANIHAN PARKS in honor of kind hearted people everywhere reaching out to the unfortunate others.

During good times, these are parks; bad times, instant evacuation centers.

About Stuvwx

This blog was started in 2013; however, it actually began in 2010 but got corrupted and backups of the original helped to restart the present blog. Prior to 2010, i was emailing people Google maps with the fault trace. But it was in 2005 when i assembled my first map. In 1990, i got ahold of a photocopy of a tabloid size, black and white map when the former Phivolcs head, the late Ricardo Punongbayan gave an earthquake awareness seminar after the July 16 earthquake. i put away the map inside a cannister and rediscovered it 15 years later when i was going through my old stuff. Instantly, sirens went off inside my head and took stock of the situation on what i had: Windows in my computer (DOS ruled PCs 15 years earlier), Adobe Photoshop, a powerful image scanner and, most of all, a coffee table book of tiled large maps of Metro Manila. Fancying what i could accomplish with technology and a 15 year old map, i put my competency at work and scanned images and assembled them on my desktop computer. Lo and behold, even after checking the work several times, i got the jolt of my life when i discovered my rented house was actually sitting on top of a fault line! Not long after, i evacuated and resided far from any faultline. At the time, i was probably one of the few (not that i know anyone else) who assembled a map of the fault line. What were the chances that i assemble a fault line map as a weird activity and suddenly find myself and my family at risk and unaware that a silent, deadly fault line ran directly under our house. It was an epiphany! Since then i knew what i had to do, and God brought everything to pass easily and smoothly. However, truth to tell, creating the maps was so nerve-wracking and I could not have done it all if I weren’t a bit of obsessive-compulsive in me. For many months, everyday I had to devote about four hours piecing together up close snapshots of many topographical maps and later google maps to create this blog. I could say i literally spent tens of kilometers after kilometers assembling detailed maps and from the experience, I made many observations that I made posts of. The gratifying moment came when Phivolcs and the NDRRMC maybe through an influential follower of my blog, I suspect, launched a media blitz with campaign to protect the welfare of students whose schools, and many they are, are in the path of fault lines. I knew my work became basis of this and I couldn’t help but feel that i had accomplished at least one of my life’s purpose. i may just be accomplishing God’s will; but then again, maybe not. Only God knows. “There will be great earthquakes, and there will be famines and plagues in many lands, and there will be terrifying things and great miraculous signs from heaven.” -Luke 21:11 “At that very hour there was a severe earthquake and a tenth of the city collapsed. Seven thousand people were killed in the earthquake, and the survivors were terrified and gave glory to the God of heaven.” -Revelations 11:13 “Nation will rise against nation, and kingdom against kingdom. There will be famines and earthquakes in various places.” – Matthew 24:7 * * * * * * * * * * * * * * * * * * * * * * * * “Therefore will not we fear, though the earth be removed, and though the mountains be carried into the midst of the sea;” -Psalm 46:2 * * * * * * * * * * * * * * * * * * * * * * * *
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1 Response to Taal Volcano lies on the West Valley Fault

  1. Nimfa Doroteo-Camua says:

    Good morning, Tulisanes. From your study, do you see Palawan as really protected from earthquake and tsunami? Could you please explain? Thanks for your reply

    Sent from Yahoo Mail on Android


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