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.

[Quix]

THX THX.

[winoneforthegipper]

That 6.5 in Brazil shows no secondary s/wave signatures in any of the webicorders I looked at through the usa.

http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/us2010wrbc.php

Weird and something to watch.

[Ditter]

My sister in law is getting ready to head to Montana for the summer. I mentioned the Yellowstone activity to her a while back and she put her fingers in her ears and began to sing lalalalalalala! I hope you guys will all be OK. Are you worried?

[Unrepentant VN Vet]

Nope

[Ditter]

How can you NOT be just a tiny tiny bit worried? I have lived always on the Gulf Coast of Texas, never gave a thought to volcanoes and earthquakes. I would be a little concerned if I lived 90 miles from one.

[Unrepentant VN Vet]

Spent a few years around Corpus Christi and Kingsville, so have about the same attitude about Yellowstone blowing her top as we both probably have about hurricanes: Outside of being as prepared as I can get, worrying about the stuff won’t do much but give me more grey hair.

And being prepared for a volcano mostly means we watch for swarms that get over 3.0 to 3.5, then think about a boogie.

[Ditter]

I considered the hurricane angle, I live 50 miles from the coast and 50 ft above sea level so a tree through my roof or a tornado is what I expect from a hurricane. You are correct those possibilities do not worry me. I have cousins in Missoula and they aren't worried about Yellowstone either. But I must tell you, the ramifications of an eruption of Yellowstone is scary, much more so than a hurricane.

[Quix]

THX THX.

[winoneforthegipper]

6.0 on the atlantic ridge....

http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/us2010wsa6.php#details

Also the 6.5 in brazil shows no aftershocks listed.

[Quix]

The no aftershocks is a bit rare and wierd, isn’t it?

HARP caused???

[winoneforthegipper]

I would think it signals that it was a fore-runner quake...we shall see.

[Quix]

There’s a prefab lightweight concrete dome manufacturer in Florida, or was . . . worth building with, imho.

[Quix]

AHHHH. HMMMM

[Ditter]

I have seen dome houses....... UGLY.......... We have friends in Galveston, during Carla, the big one back in the late 50’s or early 60’s, the roof of their 2 story house was lifted off of the house. No one was hurt inside.

[Quix]

WOW.

Yeah, some can be really ugly.

Not all of them. Some are beautiful, imho.

They still enclose the most space per square foot of exterior surface area.

And far stronger.