Posted on 02/02/2010 7:06:54 PM PST by Steve Van Doorn
Since January 17, 2010 Yellowstone has had the second largest swarm ever recorded. The swarms have been steady at about 10 miles in depth and they have subsided a few days ago.
In the past two days the depth has raised up to around 7 miles and in the past couple hours quakes vastly increased.
http://www.quake.utah.edu/helicorder/ymr_webi.htm
http://www.seis.utah.edu/req2webdir/recenteqs/Maps/111-44.html
Remember this doesn’t mean we will see an eruption and it most likely means a normal volcano. It is very unlikely we will see a caldera eruption.
But these changes are significant and cannot be over looked
Some history:
Since the most recent giant caldera-forming eruption, 640,000 years ago, approximately 80 relatively nonexplosive eruptions have occurred. Of these eruptions, at least 27 were rhyolite lava flows in the caldera, 13 were rhyolite lava flows outside the caldera and 40 were basalt vents outside the caldera. Some of the eruptions were approximately the size of the devastating 1991 Pinatubo eruption in the Philippines, and several were much larger. The most recent volcanic eruption at Yellowstone, a lava flow on the Pitchstone Plateau, occurred 70,000 years ago.
Metmom thanks for the ping.
Bookmark...(And a cyber hello to AZ granny!)
Take a look at these two sites:
You can see on Yellow alert status the public doesn’t need to be informed.
after what happened at Long Valley (mammoth) it is very likely they will not.
http://quake.wr.usgs.gov/prepare/factsheets/LongValley/
http://volcanoes.usgs.gov/activity/alertsystem/index.php
then look at their statement again:
”An earthquake swarm continues on the northwest edge of Yellowstone Caldera. There is still no indication of premonitory volcanic or hydrothermal activity. As such, the Volcanic Alert Level remains at Normal.”
In other words no change in surface temperatures which would be highly unlikely when it was still 6 miles down and there is definitely no new vents.
those two signs are indications of “Strong evidence of magma movement at shallow depth.” which is red alert.
given that they could still between strong unrest and Intense unrest(yellow alert) it would be there call.
Bookmark...(And a cyber hello to AZ granny!)<<<
[Big Smile]
Howdy!!!
I always smile when I see you posting.
Oh, dear.
it has calmed a lot in the past couple days but it is still going.
As of November 2nd, 1991 he's been making disaster movies in another dimension.
Stuck in the Time Tunnel.
See if I am correct here.
No activity to speak of since 5am, by my calculations we should see a ramp up starting somewhere in the 1800 to 1900hr timeframe.
First, Eric Holder has Justice Department lawyers read Yellowstone its Miranda rights...
Gipper how did you come up with 18 and 1900 hours UTC?
that was close enough....
The harmonics there is only 4.5 miles down that started with a 3.1 quake.
As for my predicition...still waiting...lol
The initial quake could of been from anyplace it was odd to be until you pointed out California had a sizable quake.
Steve, on a regular drum recorder, you are correct, that would be a good signature for harmonic. However on a webicorder that is just a response to the large quake.
My prediction on the restart sucked...lol
You know what is strange Steve, is that the YMR did not record the S wave at all. The other recorders all had the signature to some degree recorded quite well?
Godzilla, what is your take on that?
http://www.quake.utah.edu/helicorder/yell_webi.htm
This is why I leave this to trained seismologists. There are many factors that could have obscured an S wave signature from physical (wave propagation, materials etc) to installation deficiency. Why not contact them and ask.
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