Strong Cascadia Earthquake allows Yellowstone Seismic Mapping in Realtime

[Shared Joy]

Hi,

in completion to the following SotT article:
http://www.sott.net/article/295630-Massive-magma-chamber-hiding-beneath-volcanic-system-of-Yellowstone-National-Park

I would like to add this video:
https://www.youtube.com/watch?v=hxQDNBEjR1w,

which also presents the hidden large magma chambers, but also presents some portents which could herald an eruption and also the tsunami wave effect generated by earthquakes.

quote
Published on Apr 24, 2015
A Strong M6.2 Cascadia Earthquake allows us to seismic map the Yellowstone Caldera's shallow magma chambers in realtime! Recent Earthquakes from near and afar have given the Univ. of Utah seismologists the most detailed view of the Yellowstone magma chambers to date, with a new look into the deep magma plume that supplies the Caldera being 4 times more voluminous than previously thought. This puts the total volume of molten rock at 11.2 thousand cubic miles, able to completely fill the grand canyon eleven times!
USGS Earthquake: http://earthquake.usgs.gov/earthquake...
Yellowstone Seismographs: http://www.isthisthingon.org/Yellowst...
Scientists see deeper Yellowstone magma: http://unews.utah.edu/news_releases/s...

FWIW
Joy

 

[Cosmos]

Interesting article and video.

A Strong M6.2 Cascadia Earthquake allows us to seismic map the Yellowstone Caldera's shallow magma chambers in realtime! Recent Earthquakes from near and afar have given the Univ. of Utah seismologists the most detailed view of the Yellowstone magma chambers to date, with a new look into the deep magma plume that supplies the Caldera being 4 times more voluminous than previously thought. This puts the total volume of molten rock at 11.2 thousand cubic miles, able to completely fill the grand canyon eleven times!

So if I understand it right, the recent strong quakes in the area enabled them to measure the real size of the magma chambers in Yellowstone.

In the SOTT article we can read how that worked:

Under the radar

So how did we not notice this chamber before?

To visualise underground structures, geologists look at the way seismic waves from earthquakes pass through the areas of interest. Some types of rock - particularly molten material - slow down the waves, so when the wave speeds are measured by detectors at the surface, geologists can work out rock profiles below ground. "It's analogous to a medical CT scan," says Lin.

Features at the depths where the new chamber was found have been difficult to study because the speed of waves from below are dictated by rock closer to the surface. Lin's team got round this by combining readings from local, shallower, and distant, deeper tremors, allowing the distorting effects of the rocks nearer the surface to be filtered out.

"This allows us to simultaneously image both shallow and deeper crustal structures," says Lin. Altogether, they analysed data from 4520 local and 329 distant quakes.

Other volcanologists say the results finally prove what was long suspected, that there was another source of heat and magma beneath Yellowstone.

"This newly-discovered magmatic body supplies the heat and volatile gases essential to account for how the Yellowstone system functions," says Luca Caricchi of the University of Geneva in Switzerland.

"These results advance significantly our ability to identify the global distribution of volcanic systems with the potential to produce extremely large volcanic eruptions, which may have very large impacts on society," says Caricchi.

 

[Ruth]

Scary stuff! As mentioned by Karen on 'The Truth Perspective' 7/11/15:
http://www.newyorker.com/magazine/2015/07/20/the-really-big-one