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Indy
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Yellowstone - January 2008 Update
| Official Advisory/Bulletin: | Friday, February 1, 2008 15:14 MST
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN
January 2008 Yellowstone Activity Summary
Earthquake activity in the Yellowstone region is within background levels and GPS data show continued uplift in the current inflation cycle.
Earthquake Summary: During the month of January 2008, 263 earthquakes were located
in the Yellowstone region. These events were part of three clusters of earthquake activity, a common mode of occurrence for Yellowstone, and were an extension of an earthquake swarm that began on Dec. 29, 2007. The largest shock was a magnitude 3.7 on January 9, 2008 at 2:37 PM MST, which was located within a swarm of smaller earthquakes located about 10 miles northwest of Madison Junction, YNP, and 11 miles northeast of West Yellowstone, MT, The shock was felt by persons in Yellowstone National Park, West Yellowstone MT, and in other areas of western Montana. The principal shock was followed by 123 later shocks of magnitude -0.8 to 2.9. An additional swarm occurred January 25 to 26 that was located about 4 miles north of Old Faithful, YNP. This sequence had 32 events ranging from magnitude 0.7 to 2.4.
Ground Deformation Summary: Through January 2008, continuous GPS data show that most of the Yellowstone caldera continued moving upward at similar to slightly lower rates as the past year. The maximum measured ground uplift over the past 38 months is ~18 cm at the White Lake GPS station. An example can be found at: http://pboweb.unavco.org/sha...ies_plots×eries=raw
The general uplift of the Yellowstone caldera is scientifically interesting and will continue to be monitored closely by YVO staff.
An article on the current uplift episode at Yellowstone and discussion of long-term ground deformation at Yellowstone and elsewhere can be found at: http://volcanoes.usgs.gov/yv...br/> | align="center" style="color : #ffffff; background-color : #D8141A;">Alert, Advisory, Warning, etc from a government agency.
Source: http://volcanoes.usgs.gov/yvo/
January was quite a bit more active than recent months. Things had been relatively quiet around the park. Now we've had the big quake in Nevada. Lets see if activity picks up. Also 18cm of uplift in 38 months might not sound like a lot but it is still over half a foot. Uplift was 7 inches.
"I think God gives us children so death won't come as such a disappointment." - Two and a Half Men |
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apex
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As well as that, the uplift might be getting larger.
Last March, it was at this:
| Official Advisory/Bulletin: |
Ground Deformation Summary: Through February 2007, continuous GPS data show that most of the Yellowstone caldera continued moving upward at similar to slightly lower rates as the past year. The maximum measured ground uplift over the past 31 months is ~14 cm at the White Lake GPS station. An example can be found at: http://www.mines.utah.edu/~g...S/Site_Info/pboscat_lkwy.gif
| | Alert, Advisory, Warning, etc from a government agency. |
The thing is though, how much of a significant change is a few centimetres. |
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MountainManMike
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what if we r looking in the wrong place for the eruption...seems like with the timing and movement of the NA plate, we should be looking northeast of the yellowstone caldera under the mountains. we certainly know that there is activity at yellowstone but could the big stuff be hidden under a lot of thick rock and mountains to the northeast? |
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Indy
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How much could the hot spot have moved in 700,000 years?
"I think God gives us children so death won't come as such a disappointment." - Two and a Half Men |
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MountainManMike
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theres no way to be exact...plates speed up and slow down. the slowest rate that a plate moves is the arctic ridge at 2.5 cm a year according to usgs...but lets say its only 1 cm a year. now, i may have screwed up a decimal this late but my numbers come out to 700 miles. now i doubt its moved that much but it shows how far it could move in theory. |
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MountainManMike
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being that the movement i have on the arctic is a ridge, that may be misleading. u may have to divide that by two. im not too sure. it just seems ridiculous to me that according to scientists, its last eruption was 700,000 ago yet it hasnt moved. let me see if i can find a map of its movements prior to the last 3 eruptions. |
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MountainManMike
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http://esa21.kennesaw.edu/ac...s/platespeed/plate_speed.pdf
http://www.idahogeology.org/...es/Supervolcano_Activity.pdf
theyve got a map on each of these. |
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posted on 2/22/2008 at 19:06
