Thanks JimSEA.
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Posted on 04/28/2016 9:03:59 AM PDT by JimSEA
On 14 April, a magnitude-6.2 earthquake struck the Japanese island of Kyushu. Two days later, Japanese officials reported towering plumes of smoke at Mount Aso, a volcano 42 kilometers away from the quake’s epicenter. A small eruption was occurring. Could the distant earthquake have triggered it? Mount Aso has had far bigger eruptions over the past few years, well before the earthquake occurred, so it was probably just a coincidence. But a new study concludes that the idea of so-called far-field triggering is not so far-fetched. Big earthquakes can slosh around the bubbly magma underneath volcanoes hundreds of kilometers away, researchers have found, releasing gases that can increase magma pressure and even lead to an eruption.
In a very general sense, earthquakes and volcanic eruptions tend to be clumped in space and time anyway, because both often occur along the grinding boundaries of tectonic plates in Earth’s crust. Most individual volcanic eruptions are also preceded by tiny tremors, directly underneath, that are associated with the actual movement of magma in underground chambers—an eruption early warning signal that has been monitored effectively by geoscientists.
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More recently, the massive 1991 eruption of Mount Pinatubo in the Philippines was suggestively preceded by a magnitude-7.7 earthquake centered 100 kilometers away the previous year. A 2009 study, by volcanologist David Pyle and his colleagues at the University of Oxford in the United Kingdom, found that eruption rates of volcanoes in Chile significantly increased in the 12 months following any earthquakes of magnitude 8 or above.
(Excerpt) Read more at sciencemag.org ...
Reading the entire article at the source is necessary to get an understanding of what they are talking about. A very large earthquake creating a "sloshing" of the magma in a partially filled magma reservoir triggering an explosion a fair amount of months later.
Rising ocean levels are putting unnatural pressure on the Earth’s crust, triggering worldwide earthquakes, and, as we see here, causing increased volcanic activity. Woe, woe, shame on us.
They should pay me to write this stuff.
Increased CO2 emissions from SUV’s force more CO2 into magma making it much more volatile and volcanic eruptions more destructive.
This stuff writes itself...
I believe that the huge oil tanks in super tankers, freighters, and Naval vessels also are built with internal bulkheads that allow but restrict the SLOSHING of the oil when the ship is rolling with the seas.
Ships at sea roll port to starboard (right to left) and back with a steady rhythm and also bow to stern. If a ship is low on fuel, this steady sloshing can actually result in capsize in heavy storms and seas.
Yes it is terrible what they are doing why just yesterday there appeared a huge crack in the earth’s crust in the Atlantic basin - if these quakes keep up the earth will split in half and we are all going to die - stop global warming now!
The Earth is a living breathing entity. Anyone who understands rudimentary science knows that. Something is always going on within the Earth and for all practical purposes we humans are powerless to stop or start it.
Global warming causes prostitutes to work shorter hours,thereby increasing food stamp usage, and increasing our national debt.
42 km (roughly 26 miles) is about the length of a marathon race. It's distant only if you are trying to run that far on foot. And if I had a volcano erupting 26 miles from me in the same fault system, I'd consider it close instead of distant.
San Francisco is 250 miles from the active volcano Mt. Lassen. Several years after the 1903 earthquake, Mt. Lassen had a major eruption, in 1915. Probably a coincidence but still interesting to ponder.
Actually, now that drilling activity is down, there is less pressure being let off the interior of the planet. Either we resume, or it will pop like a rotten egg...
Oh noes!!!! Gaia has the hiccups! Weesa gonna dieee!
The earthquake is a symptom of plate movement. That plate movement may well cause point source compression waves to slosh around in the mantle, and that might stimulate volcanic activity elsewhere. I would think subduction zones would act as baffles and reflectors of those compression waves.
I think what is interesting here is that the volcano has no direct connection to the fault moving in the earthquake. The earthquake triggering or influencing to eruption is not part of the volcano’s system of faults with direct relationship with the upward pressure of the magma.
Those waves would be expected to 'break' in subduction zones and under mountainous regions where the plates ride deeper in the mantle, or be reflected and or refracted by such obstacles protruding into the mantle.
If the situation exists, and the angles were right, nodal and 'rogue wave' points should occur as well with those reflected or refracted waves, much as they do in water at the surface.
Consider, too, that the plates are connected, and the relief of stress in one area might translate to a relief of compression or even tension along those plate boundaries in another area as well.
Much of the volcanic activity on the planet is associated with plate margins, so it would be understandable if the stress adjustments among the plates could lead to the compression of (increase in stress on/pressure in) magma chambers or the weakening of lithologic material blocking pre-existing pathways to the surface, or both.
42 kilometers or 100 kilometers are not what I’d call far away. And the earthquakes, rather than causing the volcanic activity may have been caused by the building pressure that resulted in the eruptions.
Surprisingly, no mention of global warming, fracking, offshore drilling...they must be slipping!
But then, I didn’t click through; maybe it WAS mentioned!
Don't hook on that par 5! How many strokes for the lateral magma hazard?
Remarkably enough, no consideration of human caused anything was mentioned, nor should it have been.
Interesting stuff.
After studying geology a bit I’m pretty sure there is a direct relationship between volcanoes and earthquakes.
IN many cases, volcanoes are the result of friction caused when one plate dives underneath another. The friction over long periods results in melted rock, or magma. In an area with a thinner crust, it can form a bubble on the surface, think of a weak spot in a tire forming a bubble. Now and then that weak spot breaks open, you have a volcano, the pressure underneath causing it to spray magma upwards and outwards, similar to what happens if the weak spot in the tire breaks.
Earthquakes are the result of large scale movement in the tectonic plates, which constantly move in various directions very slowly. The edges of those plates where they meet are not straight lines, but jagged edges. The most commonly known problem area in the US is the San Andreas fault in California. In times of little or no earthquake activity, it’s still trying to move, but “hung up” on that jagged edge. An earthquake occurs when it suddenly lets go and moves quite a distance to compensate. In some cases, movement of as much as 6 feet at once has been documented. Normal movement is about 2 inches a year, if I remember correctly.
The Pacific plate, which results in the “ring of fire” is rotating counter clockwise, meaning in a couple of thousand years, L A will be part of Alaska. The ring of fire, is a system of volcanoes caused by the friction of that motion. I need to look into it a bit more, but I think areas of high earthquake activity are also associated.
In Japan, the plate is both rotating, and diving under the plate Japan sits on. 42km is not far at all, geologically, when you consider the size of the plates involved. How wide is the pacific ocean? 42km is nothing...how far is the other side of the bed...compared to the drive to the other side of town?
So the friction involved when one plate dives under another, combined with the sudden jerks caused by irregularities in the surfaces of both, should logically result in both volcanoes and earthquakes. Add in the motion of sloshing, you have a place that is not entirely safe to live...
Also consider, any time we see a quake of higher magnitudes, people feel tremors as far as 100 miles away. That’s a lot further than 42km...
Then we have Yellowstone. That’s the one that worries me. Yellowstone is a Caldera, also known as a super volcano. If it blows, and it’s long overdue, it will probably be a combination of earthquake and volcano and will be a major national disaster, if I remember it right, Yellowstone is estimated to have the capability of covering at least half the US with a layer of ash 6 feet thick. Even if no earthquake is involved, it will have a disastrous affect on millions of square miles of real estate. And recently it’s been discovered that the magma pool below it is much much larger than previously thought...4 times as large I think...
Scary stuff, but also very interesting...if you want to know just what a volcano can do, just look up Pompeii.
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