reply to post by WorkinStiff
Interesting stuff. And just when I was being contented by Yellowstone's return to a more rountine level of seismisty. But I think you've helped
cyrstalize some of my recent thinking.
Yellowstone's crust is at it's thinnest five miles thick. The swarm reached depths of roughly 4.32 miles down. That's right ontop of the molten
chamber.
I've spent my time out here wailing about water. And getting sidetracked by the pipecleaner/caterpillers and the antiquated monitoring system in
the park. I don't want to believe in a conspiracy, but... let's not go there.
I have stated that I believe that a major eruption will happen due to the hydrothermal movement under the lake and provide an experiment to
demonstrate dynamic. I also believe the fault which ruptured was along the Huckleberry Ridge Caldera Fault as apparently approximated on the maps
which show previous calderas. I have tried to get those involved here to put the magma on the back burner and think about the water movement as it
pertains to the geyser system in the crust. But to test any idea you have to play the devil's advocate and agrue with yourself. And I've been
thinking recently that there was indeed a movement of magma which caused the intial swarm. My counter hypothesis, which I have no proof for, and it
flies in the convention that tetonic plate ruptures create vulcanism locally, is that magma pressure and the flow is world-wide and intimately
connected. During the months of December and January, pressure was increasing everywhere, looking for a weak point. Yellowstone rumbled. Redoubt
rumbled. And Indonesia never stops. Luckily for humanity, Redoubt and Indonesia were the weakest links.
But my ideas are just a thought experiment. Let's put aside my pet theory. And look to the experts. According to Dr. Wu-lung Lang, there has been
a giant injection of magma into the chamber the size of Los Angeles over the last years. This hotter material may have risen under the lake and caused
the swarm. This injection has added a different, hotter, thermal mix to the equation. It would obviously cause the chamber to reconform due to thermal
flux. It's pretty elementary. The intial swarm could have been caused by the impact of the rising material butting up against the chamber roof.
But I cannot dismiss the hydro-thermal compontent. According to Dr. Robert Smith, the largest swarm in 1985 was mostly likely due to
hydrothermal movement. A super-heated dyke of water probably ruptured through a separating wall and entered another section of the aquifer. I believe
this happened when the quakes migrated to the north during the Yellowstone Lake swarm.
So what happened? Both. First, a plume of hotter magma from the injection plane rose, collided with magma chamber roof, expanded the crust, which
caused a rupture in the HuckleBerry Ridge fault. This hotter material then super-heated ground water which in turn expanded, and exploded through
separating walls and entered the larger aquifer in a northward direction. This swarm was different, complex, and multi-dimensional.
So what does all this mean? It means Yellowstone will blow within the next five years. Enjoy.
P.S. I'm glad Shirakawa has visited us, and I knew they would have the location of LKWY. And I concur with all the suggestions for photographs,
thanks for the offer.
Sorry, prattling on in thy own head. Just to illustrate my words here, in an attempt to clarify it for myself, it's a pot boiling on the stove.
Heated material has bumped the lid and gas has escaped. It's just in different states of matter.
[edit on 15-4-2009 by Robin Marks]