Wednesday Whatzits: Mixing it up at Hood, alert lowered at Taal and plumes over Vanuatu

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Mt. Hood in Oregon, taken August 2008. Image by Erik Klemetti. Click on the image to see a larger version.

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Back in the days when Eruptions was on Wordpress, I held a vote about what volcano should be the next to be profiled on this blog. The winner was Mt. Hood in Oregon, and after much waiting, the profile is here. I will actually be out of town until Monday doing some house shopping in this little…
The next up in my Volcano Profiles Series, is one of the most remote volcanoes on the planet, yet also one of the more closely studied and monitored (albeit from afar). Joining Vesuvius, Hood and Rabaul is Mt. Erebus, an active volcano on Ross Island in Antarctica and it definitely has some unique…
The final part of Etna Week, brought to us by guest blogger Dr. Boris Behncke. Check out Part 1 and Part 2 as well! Etna Volcanic hazards By guest blogger Dr. Boris Behncke. Etna is one of the most active volcanoes on Earth, and a population of nearly one million people dwell on its flanks, many in…
This is Part 2 of 3 from guest blogger Dr. Boris Behncke. Check out Part 1 here. The current dynamics and activity of Etna by guest blogger Dr. Boris Behncke The recent behavior of Etna is characterized by nearly continuous eruptive activity from the summit craters and eruptions from new vents on…

So if there is an earthquake swarm at Mt Hood it would be best to take notice earlier rather than later.

By Dasnowskier (not verified) on 04 Aug 2010 #permalink

Here is the abstract of an interesting paper. I wonder if the full paper gives any specific info on plate tectonic differences below Mt. Hood? (From mantleplumes.org)

Xue, Mei; Allen, R.M., Mantle structure beneath the western United States and its implications for convection processes, J. Geophys. Res., 115, No. B7, B07303, 2010.

By pyromancer76 (not verified) on 04 Aug 2010 #permalink

@2: No, it's a 'Big Picture' type article. Better reads on the cold mantle down-welling process under Western US:

Dripping 'Blob' Under Western U.S.: A Hidden Drip, Drip, Drip Beneath Earth's Surface. Science Daily May 2009

www.sciencedaily.com/releases/2009/05/090526171813.htm

John D. West, Matthew J. Fouch, Jeffrey B. Roth, Linda T. Elkins-Tanton. Vertical mantle flow associated with a lithospheric drip beeath the Great Basin. Nature Geoscience 2, 439 - 444 (2009) DOI: 10.1038/ngeo526
(full paper below)
www.iris.edu/hq/esreg/priv/download_file/127

Western USA mantle structure and its implications for mantle convection processes. (same authors as paper cited by Pyromancer)

seismo.berkeley.edu/annual_report/ar07_08/node14.html

"Nevertheless, the long-and-short is that magma mixing seems to be a strong control on eruptions at Mt. Hood, where mixing of two different magmas (one felsic, one magma)"

I am assuming you meant one felsic, one mafic...or did you mean that a felsic magma can interact with any other type to trigger an eruption?

By VolcanoMan (not verified) on 04 Aug 2010 #permalink

@VolcanoMan - Oops, thanks for catching that. It was supposed to say "mafic". Will fix it now.

TJÃRNES FZ:

I have been waiting for someone with a bit of knowledge to write about the long series of quakes we have been seeing at TFZ (about 10 km north of Grimsöy).
It has after all been going on for more then 2 weeks now without letting up.
The action is not situated at the site of the 1868 underwater eruption, it is to the nort-west to it. Lurking did a nice picture of it a week ago that seemed to show that it was a pipe pattern to the quakes.

So, anybody with a take on this? Is it an eruption, or a what?

Looking forward to any answer.

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