Is your house standing on an earthquake faultline?

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Remember Haiti. Just recently, Negros Oriental. Will the Marikina
Valley Faultline move next?

While Phivolcs estimates the return period of this quake at about
200 to 400 years, no large earthquake has occured in the West
Valley Fault since the 1700s. With the last significant event recorded
in 1658, or about 350+ years ago, scientists say the faultline moving
now is long overdue.

Below are three versions of the maps I assembled which reveal the
more populated sections of the WEST FAULT of the Marikina Valley
Faultline System (MVFS).

To view these maps, pls. click on each image (while pressing the Ctrl
button) to open in separate browser tabs. Again click to ZOOM IN
close-up to make the street names readable (you may wait five
seconds for the image to focus). Then SCROLL LEFT and RIGHT or
UP and DOWN to navigate through the path of faultlines.

PHIVOLCS’ WEST FAULT__MAIN METRO
My one long stitched-up version of the many faultline maps of Phivolcs which you can verify from its official site.

GOOGLE MAP’S WEST FAULT__MAIN METRO
< detailed, updated, and revealing >
Another one long map I painstakingly assembled from the fault trace located by nababaha.com on Google Map.

PROOF OF ACCURACY
While our only source of the MVFS are the maps from Phivolcs, this trace overlay of the faultline from my assembled Google Maps approximates the faultline of Phivolcs with a high level of accuracy.

As quick preview for these maps (chances are the following list is
not complete –please let me know what communities and subdivisions
that i missed out), the WEST FAULT all along has been sitting right
under the noses of  residents of the following barangays and subdivisions:

PEMBO
……………COMEMBO
………………………………EAST REMBO

BAGONG ILOG
…………… KAWILIHAN
………………………………ST. JOSEPH HEIGHTS

CALUMPANG HILL
……………VALLE VERDE
……………………………..GREEN MEADOWS

WHITE PLAINS
………………ST. IGNATIUS
………………………………INDUSTRIAL VALLEY

DON JUAN
……………CINCO HERMANOS
………………………………LOYOLA GRAND VILLAS

LOYOLA SUBD.
……………BARANGKA
………………………………CAPITOL HOMES

SUNNYSIDE
……………DOÑA ANA
………………………………FILINVEST HOME II

BAGONG SILANGAN

Continuing south-bound…

The WEST FAULT continues in the direction of south-west using the
leftmost side of the “main metro” maps above as take-off point.  To
explain, the “south-bound” maps below end where the “main metro”
maps above begin.

With this in mind, the following maps can be viewed starting from the
right going left:

PHIVOLC’S WEST FAULT__SOUTH-BOUND SUBURBIA

GOOGLE MAP’S WEST FAULT__SOUTH-BOUND SUBURBIA

Coming from Libis, Quezon City and continuing in the general
direction of Bicutan, Taguig, then for a short distance running parallel
to Manuel L. Quezon Rd and SLEX, the faultline becomes hardly
straight and visible and breaks into scratch-like marks to affect many
areas in Muntinlupa, Biñan, and Carmona. It tapers off with a series
of forks or what look like bird tracks, if you will. With silent tenacity,
the WEST FAULT cuts a wide forbidding path through the following
communities while their residents remain utterly clueless:

(communities identified from left to right of these maps)
SILCAS VILLAGE
……………………………BMS VILLAGE
…………………………………………………JUANA COMPLEX

ROSARIO COMPLEX
……………………CALINDOLA VILLAGE
…………………………………………………SAMPAGUITA VILLAGE

ADELINA COMPLEX
…………………………HOLIDAY HOMES
…………………………………………………NENITA HOMES

VILLA CAROLINA
……………………SUSANA HEIGHTS
…………………………………………………PARK HOMES

LADEJO SUBD.
…………………………TUNASAN
…………………………………………………LODORA SUBD.

STO. NINO VILLAGE
…………………… POBLACION (MUNTINLUPA)
…………………………………………………JPA SUBD.

COUNTRY HOME
……………………BRUGER SUBD.
……………………………………………LAKEVIEW HOMES

FREEDOM HILLS
…………………………L&B SUBD.
…………………………………………NEW ALABANG HILLS

LIBERTY HOMES
…………………………POSADAS VILLAGE
…………………………………………………SIGNAL VILLAGE

FORT BONIFACIO
……………………………………PEMBO
…………………………………………………………COMEMBO

EAST REMBO

Cutting through the mountain…

From the Cavite-Laguna area where the WEST FAULT is last
located, we swing to the other side of the “main metro” maps where
the other end of the WEST FAULT touches Filinvest Homes II and
Bagong Silangan in Quezon City.

Again, to re-orient the reader, the maps below begin where our first
posted maps labeled “main metro” end:

PHIVOLC’S WEST FAULT__MOUNTAIN-SIDE UPPER FAULTLINE

PHIVOLC’S EAST FAULT__MOUNTAIN-SIDE LOWER FAULTLINE

GOOGLE MAP’S WEST-EAST FAULTS__MOUNTAIN-SIDE PARALLEL FAULTLINES
<Note: affected areas in San Mateo and Montalban also shown>

This other end of the WEST FAULT seems to halt in the far reaches
of Quezon City near Montalban which, I believe, are already the
foothills of a mountain. Though at a glance the area seems sparsely
populated, residents of the following barangays and subdivisions are
nonetheless warned:

SUNNYSIDE SUBD.
……………………DONA ANA SUBD.
……………………………………FILINVEST HOMES II

BAGONG SILANGAN
………………………PAGATAS
………………………………………CHRISTINE VILLAGE

AMITHY VILLAGE
………………………AMITYVILLE
……………………………………………HACIENDA REMEDIOS

Parallel faultlines overlap…

An important note: these few communities (also those others less
identifiable and not named here) appear to lie on a special area not
shared by the other residential areas listed in this blog. To wit,
shown on the Google Map that is the last map above, bounding
these communities on their north is the WEST FAULT that can
be  seen running neatly from left to right, then suddenly splitting
three ways like a fork with each fault heading off to God knows
where that is not covered by the maps.

Now hedging these communities in with the WEST FAULT above
is  the EAST FAULT below them that tapers off from the mountains
where this shorter faultline begins. At this point, EAST FAULT meets
WEST FAULT as they lie parallel to one other. What this means to
these communities surrounded by these two major faultlines, I can
only guess.

Lastly, along the EAST FAULT which lies mostly on rough, wild
country is GLORIA VISTA SUBDIVISION in San Mateo, and those
near this faultline that should be careful of landslides are Modesta
Village, Mary Hills Subdivision, and Life Home Subdivision.

◊ ◊ ◊

There. The cat’s out of the bag….

For those these revelations have been life-changing, it may do well
to rather think of it as life-saving. From first reactions of shock and
confusion, maybe also denial, realization should set in: that life will go
on and pass us by no matter what.  So people will choose to MOVE
FORWARD.

Let us realize the faultline has been there for tens of thousands of
years –maybe millions of years and will still be there even if we
humans become extinct. So let’s get a grip of ourselves.  Let us
look at the problem in the eye and deal with our situation.

Before there can be any answers, we should be asking the right
questions first.

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