Geologists
who focus on the volcanoes of the west coast and
Pacific Rim are
expressing heightened concern about
Hawaii's latest activity.
volcanoes which
run - like a string of pearls - along the
western coastal states from
Northern California to the
Canadian border.
But
the article linked above, while informative in certain
respects, is
also misleading to those who read it, but have
no familiarity to the
region.
How?
First, the article references "Spokane, WA," which is
hundreds of miles to the east side, and far away from the Cascade
Mountains. The picture of Mt. Rainier accompanying the article shows
it framed by the bridge in Tacoma over the Thea Foss Waterway.
It
should have referenced, "Tacoma, WA" or "Seattle, WA,”
as these two cities, as mentioned later in the article, are
much more
threatened by a possible eruption from the two
closest volcanoes.
I've
lived in the Northwest for nearly 35 years now, and I
know the
geography fairly well.
In
my early years here I took a course at the University of
Washington
in Geology; more specifically, volcanoes and the
earth's crustal
movement known as tectonic plate activity
during the same period as
the Mt. St. Helens eruption in
1980.
Part
of that research included David Johnston's masters
thesis on a
volcano in Alaska. Johnston was killed while
within the vicinity of
Mt. St. Helens' blast zone.
Only
a few years later, I climbed to the top of both Mt. Baker
and Mt.
Rainier and learned a considerable bit more about
the volcanic threat
of the Pacific Coast volcanoes. While
standing on its summit of Mt.
Rainier, one could see Mt.
Baker to the north and the volcanoes of
Mt. Adams, Mt.St.
Helens, and Mt. Hood to the south.
Having
lived, driven and hiked/backpacked around the
greater Puget Sound
Region, I've often wondered just how
effective the various
communities which lie within eye sight
of the volcanoes would be,
should one of them erupt.
Anyone
who knows the natural geography of the area
realizes that the valleys
which snake out in all directions
from the base of a volcano were
created in the distant past
by former eruptions and the resulting
massive lahars, which
travel downhill and out to the lower
elevations, carving them
out even more.
Yet
even with this knowledge, there have been many
communities developed
over the years which are on the
valley floors of many of the paths a
lahar would take.
Any
lahar - a pyroclastic flow sweeping down through the
valleys which
surround every volcano - contains a
combination of melted glacier
ice, ash and rock that turns
into a massive moving lake of viscous,
hot "cement" with the
front of that flow essentially being
a huge wall that sweeps
clean the valley it flows through.
Nothing
can stop it and everything in its path is destroyed
and often buried
several feet deep in scalding hot mud and
boulders (some larger than
houses). One needs only to
search for footage of this on YouTube to
see lahars from Mt.
St. Helens flowing down the Toutle and Cowlitz
Rivers.
The
article claims - as do many of the communities which
reside in the
valley carved out by previous massive
eruptions – that there are
plans in place to evacuate their
citizenry to higher ground and that
they regularly practice the
drill to evacuate. This is ludicrous. The
actual time Orting, for
instance, would actually have to evacuate,
compared to the
time they take for their evacuation drill, would be
considerably longer.
With
the increased housing development which has
occurred over recent
decades, and my familiarity with the
limited roads and highways which
connect to higher ground
out of the valleys to get away from an
oncoming lahar flow,
it's obvious to me that the resulting
devastation will be much
worse than they believe will occur, and that
many thousands
– perhaps tens of thousands - will perish.
This
fact is precisely why, when buying my house, I
deliberately chose a
property on a hill - roughly 500 to 800
feet high- above the nearby
area where a lahar will
ultimately empty its contents; hot water,
ash, boulders, and
anything in its path, as it flows down the valley
on its way to
Puget Sound … which is exactly what happened in the
past,
well before there was any modern development.
Yet,
hundreds of thousands of people go about their daily
lives, working
and living in their homes in the very path
which has the potential to
sweep clean any and all in the
lahar's way.
God
forbid that it ever happens... but if it does, we'll have
hell to
pay. And we'll have only ourselves to blame.