BS: Montana Earthquake July 2017

Subject: BS: Montana Earthquake
From: Ebbie
Date: 06 Jul 17 - 10:13 AM

Not a huge temblor (5.8) as earthquakes go but felt for hundreds of miles around. Rap, are you through shakin'?

Subject: RE: BS: Montana Earthquake July 2017
From: leeneia
Date: 06 Jul 17 - 11:56 AM

Here's the seismic info on this quake:

https://earthquake.usgs.gov/earthquakes/eventpage/us10009757#executive

Montana has a flat eastern part and a mountainous western part. The quake occurred about where the mountains begin, near Lincoln.

All the lingo at the beginning of 'Tectonic Setting' merely means that the movement along the quake was horizontal - two masses of land were sliding or jerking past one another, side by side.

It would not be unusual for shock waves which went east to be felt for hundreds of miles. East of the mountains, rock layers are relatively strong and unbroken, and waves can travel far.

In 2010, a 5.6 near OK City was felt in Chicago.

Subject: RE: BS: Montana Earthquake July 2017
From: robomatic
Date: 06 Jul 17 - 02:59 PM

Welcome to my world!

Subject: RE: BS: Montana Earthquake July 2017
From: Ebbie
Date: 07 Jul 17 - 02:14 AM

I imagine you feel them more often in your area than we do down here in Southeast, robomatic. The official word here is that we experience an average of two a month but that they're so light we rarely feel them. We had a couple a month or so ago that made us sit up and take notice but it's all quiet again.

Subject: RE: BS: Montana Earthquake July 2017
From: Rapparee
Date: 07 Jul 17 - 09:25 AM

Houses fell, buildings collapsed, gas lines broke and caught fire, people were buried under rubble or electrocuted by broken power lines, no telephone service of any kind, amateur radio nonexistent, the Army called in with "shoot to kill" orders, buildings dynamited to create firebreaks -- oh, wait, that was San Francisco in 1906.

Nothing much, Ebbie. I didn't even know it happened until I saw it on a seismographic website I visit. Farther north it was felt more strongly, here it registered on the seismographs at the University. First responders got a "heads up" message just in case Something More happened. It pretty much wrecked a couple of bars in Lincoln, Montana, though, knocking all the bottles and glasses off the shelves and tumbling the beer kegs. We get them all the time, but rarely more than a 2.0. People ask me all the time "What would you do if Yellowstone blew?" The answer is, "Not much -- I don't have a cork big enough to stop it."

Subject: RE: BS: Montana Earthquake July 2017
From: Iains
Date: 07 Jul 17 - 10:43 AM

There is a body of research suggesting yellowstone geyser periodicity can be temporarily altered by seismic events at considerable distances.
http://onlinelibrary.wiley.com/doi/10.1029/2003GL017853/full

Subject: RE: BS: Montana Earthquake July 2017
From: Rapparee
Date: 07 Jul 17 - 03:56 PM

The "smile" on the map of Idaho is caused by the Snake River and the Yellowstone Hot Spot as it moved to its current location. Craters of the Moon National Monument (a really great place!) was formed by lava moving upward so recently that it figures in the tales of the Shoshone and other nations.

Subject: RE: BS: Montana Earthquake July 2017
From: leeneia
Date: 07 Jul 17 - 04:27 PM

You're right about Craters of the Moon, Rap. I've been there, and it's a remarkable place.

Subject: RE: BS: Montana Earthquake July 2017
From: Bill D
Date: 11 Jul 17 - 11:33 AM

http://www.earthquake3d.com/

A graphic time and/or intensity review of quakes. (Also downloadable in Windows)

Subject: RE: BS: Montana Earthquake July 2017
From: Bill D
Date: 11 Jul 17 - 11:40 AM

what it looks like (Earth turns at the rate and angle you choose)

Subject: RE: BS: Montana Earthquake July 2017
From: Donuel
Date: 11 Jul 17 - 11:54 AM

Hey Bill regarding your most recent global map it looks like the missing space in the line of recent quakes is ,gulp, Yellowstone.

Subject: RE: BS: Montana Earthquake July 2017
From: Bill D
Date: 11 Jul 17 - 12:31 PM

It depends on the # of days and EQ strength you set to show.

Subject: RE: BS: Montana Earthquake July 2017
From: Donuel
Date: 11 Jul 17 - 01:47 PM

I suppose we can massage the data all we want but like the Casino, the Uncertainty Principal always wins.

Subject: RE: BS: Montana Earthquake July 2017
From: Bill D
Date: 11 Jul 17 - 05:17 PM

"Que sera, sera"......... except when we can avoid it by being clever, alert and careful.

Subject: RE: BS: Montana Earthquake July 2017
From: Donuel
Date: 11 Jul 17 - 07:16 PM

Alert and careful we can do but being clever in volcanology involves complexities that are unfathomable. We can know historic frequencies of eruptions and a few earthquakes from tsunami evidence but we do not know the breaking point of quadrillions of tons of subterranean rock features or even the actual forces on rock structures.

The action movie San Andreas features a earth scientist Paul Giamati who unlocks the secret. That's when I lost my suspension of belief.

I'll get back to your data page after I sign in to google.

Subject: RE: BS: Montana Earthquake July 2017
From: Rapparee
Date: 11 Jul 17 - 10:13 PM

Living where I do, I got better things to worry about. Check this and remember, about a meter of ash would fall where I live. I really need to buy a new umbrella.

Subject: RE: BS: Montana Earthquake July 2017
From: Donuel
Date: 11 Jul 17 - 10:33 PM

That's gulp, what i'm talking about. I remember seeing the fallout from Mt St Helens and that was a fire cracker in comparison.

Subject: RE: BS: Montana Earthquake July 2017
From: leeneia
Date: 11 Jul 17 - 11:46 PM

The earthquake near Lincoln, Montana was a 'strike-slip' quake. This means that two sections of rock slid past one another. There might be some uplift or down-dropping, but most of the motion is horizontal.

This is not what we would expect to see if volcanism were occurring. We would expect doming or stretching of the landscape, not strike-slip movement.

The DH, a full-time geologist, says "It's probably not related to the Yellowstone hot spot."

Subject: RE: BS: Montana Earthquake July 2017
From: Rapparee
Date: 12 Jul 17 - 09:47 AM

Among other reasons, why I'm not worried. And as I said earlier, what can you or I do about it?

Subject: RE: BS: Montana Earthquake July 2017
From: Donuel
Date: 12 Jul 17 - 10:26 AM

Rap You could leave a profane posture and hand signal that would stump archeologists who were familiar with Pompei victims.

By the way an 'iceburg'/ice shelf the size of Delaware finally broke free of the Antarctic and is adrift as predicted.

Subject: RE: BS: Montana Earthquake July 2017
From: Rapparee
Date: 12 Jul 17 - 09:12 PM

That's probably what triggered the earthquakes up around Lincoln. Montana has a special relationship with the Antarctic.

Subject: RE: BS: Montana Earthquake July 2017
From: leeneia
Date: 13 Jul 17 - 11:23 AM

What can you do about it?

Save money so you can afford to leave if trouble threatens.

Pay attention to warning signs. (Quakes, harmonic tremors) Don't be another Harry Truman.

Don't accumulate valuable, stealable property so you are reluctant to leave your home.

Teach your pets to come, to assist in a rapid evacuation.

According to the article, the big eruptions are hundreds of thousands of years apart. Your life expectancy is a lot shorter than that.