So far, 2017 has been an extraordinary year for natural
disasters with three hurricanes and awful wildfires. What possibly could come
next?
According to
some folks, it could the big blow – the eruption of the famous Yellowstone
National Park Supervolcano. Or perhaps just an earthquake?
But first,
let’s just ponder for a moment the extreme forces that have struck our country
this year. Few folks can recall a time in America when gigantic hurricanes the
size of Harvey, Irma and Maria slammed into Texas, Florida and Puerto Rico.
And those
wildfires in California have been the deadliest in that state’s history with
more than 40 people dead and 6,000 homes and buildings destroyed. Prior to
those fires, deadly fires struck Montana and Canada in late summer.
So what gives?
Do these events portend the beginning of the end of the world?
Well, probably
not yet. But what is next? Well, heck,
why not the Yellowstone National Park caldera causing havoc?
Mark Davis of
the Powell Tribune wrote an excellent
article recently about this possibility, which for him was a “local” story. If
the park volcano acts up, Powell will pretty much become toast.
As well as Worland, Lander, Riverton, Rawlins, Rock Springs,
Kemmerer and Evanston.
Davis wrote a
news story quoting the world’s foremost expert on the Yellowstone caldera, Dr.
Bob Smith, of the University of Utah.
Davis wrote that Smith has worked
in Yellowstone since 1956 and has been a professor of geophysics for 50 years.
“Global appreciation for Yellowstone didn’t come about until
2005, when the BBC produced The Super
Volcano. It brought the world’s attention to Yellowstone,” Smith said.
Smith nonchalantly stated the facts
of a Yellowstone super volcano eruption at a recent lecture: An eruption that
could last for days, weeks or even years, five to 10 times more powerful than
the 1990 Pinatubo eruption in the Philippines that killed 700 — spewing enough
material to fill the Grand Canyon twice and a volcanic winter, possibly for
years, at temperatures of about 15 degrees Fahrenheit.
He reported: “A recent earthquake
swarm — and the press from those on the sensationalizing end of the media — has
worried many that the rumbling is a precursor to a volcanic eruption. Since
June 12, more than 15,000 earthquakes have been documented. Most are weak, but
are earthquakes nonetheless, Smith said. ‘It’s one of the biggest earthquake
swarms we’ve ever had,’ he said.
But Smith’s concerns aren’t of the
dangers of a super volcano eruption. The chances of that happening are
extremely small, he said. However, before the warm comfort of the statement
could settle in, he warned of the real natural killer in the region.
“What’s the biggest hazard in Yellowstone? Earthquakes.
They’re killers,” Smith said.
On Aug. 17, 1959, a 7.5 magnitude
earthquake rocked Hebgen Lake, Montana, killing 28 people. It was the last
devastating earthquake to hit the greater Yellowstone ecosystem. By that time
Smith was already into his third year of work in the nation’s first national
park.
“The question being asked by the
rangers at Lake and Mammoth — ‘Are we going to have a big earthquake or
volcanic eruption?’ — led us to try to understand how swarms work,” Smith said.
Smith
theorizes that when the earthquakes stop, that is the time to start worrying.
Yes, Yellowstone is a super
volcano, which has erupted at least three times before. Once was 2.1 million years ago. The second
one was 1.3 million years ago and the last one was 645,000 years ago.
So what would
be the signals that YNP might act up again?
For decades in
the last century, geologists were mystified by the lack of a discernible
volcano cone in Yellowstone as they tried to locate the caldera. Ultimately,
satellite images helped them realize that almost the entire park is the
cone. It is 50 miles long and 25 miles
wide. Much of the vast Yellowstone Lake makes up this location.
Some experts
point to a bulge that is more than 100 feet high at the bottom of Yellowstone
Lake near Mary Bay. The bulge is more
than 2,100 feet long and has only formed in the last few years. One expert
asked, “Is this a precursor to a hydrothermal explosive event?”
Yes,
Yellowstone is one very, very large volcano. It would have a destructive force
ten thousand times that of Mount St. Helens. It could truly be a world-defining
event. And those of us who love Yellowstone and live about two hours from it,
well, we might just become a memory.
Some of the
features of the TV show five years ago that were interesting included quite a
few scenes of a fictional Cheyenne, which it treated as a major national city.
Amen to that.
The beginning and ending tagline of
the BBC program was: “This is a true story. It just has not happened yet.”
|