Yellowstone might go on first stage alert soon.

USGS ^ | 2/10/2010 | Myself

[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.

[winoneforthegipper]

LOL, cause I knew you would respond...lol!

I realize it is because of the calibration setting but...I just wonder why, when that particular recorder captured other S waves from the few bigger quakes recently.

Thanks for you imput, really!

[Mom MD]

Check out the activity tonight at at the YMR site. Looks like there may be some harmonics, but there is not a lot of activity at the other sites. Looks fairly isolated.

[winoneforthegipper]

Mom Md, good catch.

At your prompting I took a look at the other webicorders(I did note the activity on the YMR earlier) and yes it is strange the amount of feedback going on. Almost every recorder has responses. Indeed there are harmonic signatures in many of the webicorders.

Interesting for that has not been the case in the past among the recorders, only when there was a certified quake.

Steve, what do you think?

[Steve Van Doorn]

Look at YFT some strong harmonic motion at 8:30 and 10 MST:
http://www.quake.utah.edu/helicorder/yft_webi_1d.htm

[x_plus_one]

bttt

[Errant]

Thanks for the ping. Interesting...

[Errant]

I just ran across this...

Yellowstone eruption days away?

[Steve Van Doorn]

second thought that could be a geyser.

[P.O.E.]

Sowin on the mountain
Reapin in the valley
You gonna reap just what you sow....

God give Noah
the Rainbow Sign
Won’t be Water Be fire next time...

(Ramblin Jack Elliott)

[GonzoGOP]

So much for that elk hunt I have been saving for.

I have a vacation booked for Yellowstone in August. Just my luck the place blows up before I get there. You know I wish Obama would have put keeping the ground from blowing up ahead of stopping the oceans rising and air warming. I mean he has as much chance of stopping the worlds largest volcano as he does of stopping the other two.

[winoneforthegipper]

Reviewing the webicorders tonight, there was indeed a large harmonic tremor capture on all of the webicorders.

Shortly after 12:01 on the YPK station recorded it best.

http://www.quake.utah.edu/helicorder/ypk_webi.htm

Few things to note, since it appeared on all the webicorders this was not a localized event i.e. radio influence, traffic or geyser.

Also, note how each webicorder is set up to record such and event, quite the difference.

There were no large earthquakes recorded elsewhere in the world that remotely would match up to this being an Long duration S/Wave.

I am one hundred percent convinced this was a small harmonic event.

[Steve Van Doorn]

sure looks like it

[winoneforthegipper]

Another one at 16:28 tonight.

http://www.quake.utah.edu/helicorder/ypk_webi.htm

[Steve Van Doorn]

both ends of the valley are acting up right now it seems.

[winoneforthegipper]

A huge harmonic tremor just hit south of Salt lake City!

http://www.quake.utah.edu/helicorder/sru_webi.htm

[winoneforthegipper]

Steve, by the way found this for you tonight!

enjoy!

http://volcanoes.usgs.gov/yvo/activity/monitoring/deformation.php

[winoneforthegipper]

Wow! Check out the height elevation changes over the last few years around our latest swarm!

http://www.uusatrg.utah.edu/ts_ysrp.html

Easy to understand now the tectonics behind such a swarm.

Running from a line from Old Faithful, the elevation has risen dramatically, while just a few miles away, from a line north from Madison the area has subsided.

Good stuff right here!

[winoneforthegipper]

I posted a few links tonight above you might find interesting.

[winoneforthegipper]

To get specific using the GPS Data, I have narrowed the epicenter of the greatest differences.

Subsiding;:

Madison

http://www.uusatrg.utah.edu/TS_YSRP/p711.html

Norris Junction

http://www.uusatrg.utah.edu/TS_YSRP/nrwy.html

Elevating station within 35 miles or closer.

Old Faithful

http://www.uusatrg.utah.edu/TS_YSRP/ofw2.html

Hayden Valley

http://www.uusatrg.utah.edu/TS_YSRP/hvwy.html

YNP Canyon

http://www.uusatrg.utah.edu/TS_YSRP/p716.html

Darn when the swarm was going on I wish I would have had this information on hand...lol

[Steve Van Doorn]

I am trying to figure out how harmonic tremors can be in that location. Is there a volcano there?
I am looking at this first link you gave me it i very nice! thank you.
going to look at the other ones in a few minutes.
thanks