This subject was "smoke'n" back a few years ago during a rash of tremors but died down since. Seems to me that vulcan activiy
is up world wide since the Sumatra xmas quake especially the circle of fire points in Indo and Alaska.
Super Eruptions at Yellowstone, page 1
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Topic started on 1-11-2006 @ 11:22 AM by apex
Ok just to say first I am not suggesting that anything is going to happen. I just have been looking at things about Yellowstone for some time.
volcanoes.usgs.gov...
This page is very informative for this subject, and there is a table about when the previous super eruptions have been. 2.1 million years ago was the biggest at 2,450 cubic kilometres. The next biggest was 640,000 years ago at 1,000 cubic kilometres.
the 3rd biggest was 1.3 million years ago which was an eruption of 280 cubic kilometres. This was not technically a super eruption (VEI 8) but was a VEI 7 in size.
Using the argument of regularity then the next one should be about 780,000 years after the previous one. however looking at the decrease in intervals then perhaps another one should be soon.
This is a picture of the previous Calderas:
looking at the earthquake maps for data since 1973 then perhaps a new caldera might look like this:
This picture is just from the earthquake maps on USGS, I just outlined the rough area which may be the next caldera. I perhaps should have included the area of the Hebgen lake earthquake too.
This area may be enough to mean an approximate size similar to the last eruption.
Another site for additional information:
volcano.und.edu...
[edit on 1-11-2006 by apex]
volcanoes.usgs.gov...
This page is very informative for this subject, and there is a table about when the previous super eruptions have been. 2.1 million years ago was the biggest at 2,450 cubic kilometres. The next biggest was 640,000 years ago at 1,000 cubic kilometres.
the 3rd biggest was 1.3 million years ago which was an eruption of 280 cubic kilometres. This was not technically a super eruption (VEI 8) but was a VEI 7 in size.
Using the argument of regularity then the next one should be about 780,000 years after the previous one. however looking at the decrease in intervals then perhaps another one should be soon.
This is a picture of the previous Calderas:
looking at the earthquake maps for data since 1973 then perhaps a new caldera might look like this:
This picture is just from the earthquake maps on USGS, I just outlined the rough area which may be the next caldera. I perhaps should have included the area of the Hebgen lake earthquake too.
This area may be enough to mean an approximate size similar to the last eruption.
Another site for additional information:
volcano.und.edu...
[edit on 1-11-2006 by apex]
reply posted on 1-11-2006 @ 01:56 PM by apex
recently there have been two earthquake swarms in the park, both of them have been mentioned on the YVO page.
Source
Just realised I had forgotten to mention this.
Also, while the site mentions the uplift currently going on, it doesn't say exactly where the uplift is.
[edit on 1-11-2006 by apex]
On October 14th and 15th, there was a swarm at 74 small earthquakes at a location within the Yellowstone Caldera, 12 km NW of Old Faithful. The largest earthquake was local magnitude 2.4. This swarm is modest in size compared with other historic earthquake swarms at Yellowstone. More information on earthquake swarms at Yellowstone is available at: volcanoes.usgs.gov...
September 2006 Yellowstone Seismicity Summary
During the month of September 2006, 65 earthquakes were located in the Yellowstone region. The largest of these shocks was a magnitude 2.8 on September 7, 2006 at 7:09 PM MDT, located about 5.7 miles northeast of Canyon Junction, Wyoming. A small swarm of 13 events magnitude 0.2 - 1.4 occured on Sept 12-13. These were located about 12 miles west southwest of Old Faithful.
Source
Just realised I had forgotten to mention this.
Also, while the site mentions the uplift currently going on, it doesn't say exactly where the uplift is.
[edit on 1-11-2006 by apex]
reply posted on 2-11-2006 @ 07:35 AM by apex
i don't think that there is any easy way to get rid of the threat, except be prepared for such an occurrence. Any attempt to tap off the magma would
perhaps destabilise the chamber and cause it to blow. There was a discussion on this here:
www.abovetopsecret.com...
i would say an eruption would occur, but it would probably be anyones guess as to how big. if it were placed so it was quite close to the chamber would probably cause maximum effect.
www.abovetopsecret.com...
What do you think would happen if it got nuked?
i would say an eruption would occur, but it would probably be anyones guess as to how big. if it were placed so it was quite close to the chamber would probably cause maximum effect.
reply posted on 5-12-2006 @ 05:33 AM by apex
USGS mnthly status report:
volcanoes.usgs.gov...
I always wonder what a swarm number has to be to be "big" rather than "small". And how can there be a negative magnitude earthquake?
Uplift is stil at 13 cm.
volcanoes.usgs.gov...
A small swarm of 47 earthquakes of magnitude -0.1 to +2.7, including the largest even mentioned above, occurred on Nov 4-7, also about 12 miles west of Old Faithful.
I always wonder what a swarm number has to be to be "big" rather than "small". And how can there be a negative magnitude earthquake?
Uplift is stil at 13 cm.
reply posted on 5-12-2006 @ 08:14 AM by apex
My apologies for using the terminology too much, I on have a large interest in this, but I have read a few of the technical papers on it, and they use
things such as VEI (Volcanic Explosivity Index)
Ok. Right it is easier (wel, I find it a bit easier) with the VEI scale, which is basically a system which is logarithmic, ie it goes up in factors of ten in each number, so 8 is 10 times larger than 7, 100 times larger than 6, 1,000 times larger than 5, etc. A VEI 0 is non explosive, like Kilauea. VEI 2 is like Galeras in 1993 (i think thats the eruption in Surviving Galeras). VEI 5 is Mount St. Helens size. VEI 8 is a super eruption like Yellowstone or Toba.
en.wikipedia.org...
[edit on 5-12-2006 by apex]
Ok. Right it is easier (wel, I find it a bit easier) with the VEI scale, which is basically a system which is logarithmic, ie it goes up in factors of ten in each number, so 8 is 10 times larger than 7, 100 times larger than 6, 1,000 times larger than 5, etc. A VEI 0 is non explosive, like Kilauea. VEI 2 is like Galeras in 1993 (i think thats the eruption in Surviving Galeras). VEI 5 is Mount St. Helens size. VEI 8 is a super eruption like Yellowstone or Toba.
en.wikipedia.org...
[edit on 5-12-2006 by apex]
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