Yellowstone Supervolcano Earthquakes: Update

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Questio

I was camping outside the park just below Hebgen Dam the night before the big quake in 1959 (?) and up near Fishing Bridge the night of the big one where the ground was rolling maybe three feet and you couldn't stand up. Trees were going all which ways and as I recall Old Faithful actually stopped for a period. We were all ushered out of the park rather quickly. I was a young teenager and quite impressionable. That quake was in the neighborhood of 7.9 or 8.0 as I recall. My question is how does a quake that large (not part of an outbreak of many quakes) happen in that particular caldera environment? Why didn't it lead to some sort of major caldera event? I'm curious.

Doug Shaffer of KS @ Jan 06, 2009 19:40:33 PM

geyser under lake?

Chad in that same time period(48hours) the runoff from the lake has gone from 80 cubic feet per second (above79year median) to 100 cuft per second(above79 year median) which leads me to believe that something is rapidly melting the ice to the tune of 1,000,000 gallons per day. Maybe heat from new vents?

Reference :http://waterdata.usgs.gov/mt/nuis/uv/?site_no_06186500&agency_cd=usgs

I've been watching this site for days. can anyone tell me if there is still ice on the lake? Wikipedia says at this time of the year most of the lake is covered with 3 foot or more

Peteamazed at Net of CA @ Jan 06, 2009 18:50:47 PM

Graph not coming up

We can not get the graph to open up. I am sure it is typed correctly...any suggestions?

C. Melvin Lepper of CO @ Jan 06, 2009 18:27:32 PM

Yellowstone updates

Yours has been the most comprehensive (...and believable!) coverage of this event. I'm counting on your webpage if this thing recurs!

Rodger Wilson of WA @ Jan 06, 2009 18:03:19 PM

"Geyser" Under Lake

Those of us at Above Top Secret noticed a continuing anomaly on the LKWY Seismograph that would challenge the above statement that there have been no changes to hot springs, etc. If you review these Seismographs from 1/4 - 1/6, you'll see a continuing pattern. On 1/4, this was about every hour and forty minutes. As of today, it's about every half an hour. We surmise that this may be a new hydrothermal vent (underwater geyser) and that the decreasing eruption times are a cause for concern because it suggests the bottom of the lake is heating at an increasing pace.

On these graphs, we're looking at the thin, repeating pattern. This Seismograph is calibrated to 500 microvolts, which means these eruptions would appear bigger on most Seismographs, which are set to 100 microvolts.

1/4

http://www.seis.utah.edu/helicorder/heli/yellowstone/Uuss.LKWY_SHZ_US.2009010400.gif

1/5

http://www.seis.utah.edu/helicorder/heli/yellowstone/Uuss.LKWY_SHZ_US.2009010500.gif

1/6

http://www.seis.utah.edu/helicorder/heli/yellowstone/Uuss.LKWY_SHZ_US.2009010600.gif

Here is a graph of the Seismic eruptions, taking into account both the interval and length of the eruptions, which are between 3-5 minutes each:

http://img60.imageshack.us/img60/8995/geyser15tb7.png

This is very troubling. If this is a new vent and the water is heating faster, it would seem that either more vents will eventually appear to disperse the pressure or perhaps there is in fact a magma chamber close to the surface?

I'd appreciate any opinions!

Chad of TX @ Jan 06, 2009 17:52:59 PM

Diligence

Thank you for your diligence in what could've been a national issue. It is very appreciated.

Sue of TN @ Jan 06, 2009 15:45:17 PM

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