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Windows 7: Oklahoma Earthquake?

05 Nov 2011   #1
seekermeister

W7x64 Pro, SuSe 12.1/** W7 x64 Pro, XP MCE
 
 
Oklahoma Earthquake?

I was quite surprised that ~20 minutes ago, that my apartment started shaking for a few moments. While some Californians would find this too common to comment, it is very rare here. I have NEVER felt an earthquake here before, even though Googling, I found that there are a few minor earthquakes around the state.

I tried to find a website that I came across once, that had a live display of current seismic activity around the world, just to see if I could confirm it, and get a measurement of it's strength, but had no luck.

I also found articles that spoke of earthquake in the UK that was caused by fracking by an oil company, instead of the usual fault line movements, which seem more likely here also.

Does anyone know of the website that I spoke of, that charts live seismic activity?
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05 Nov 2011   #2
seekermeister

W7x64 Pro, SuSe 12.1/** W7 x64 Pro, XP MCE
 
 

It wasn't what I was thinking of, but I did find info on it at the USGS website. It was two shocks a few seconds apart, the first was 4.7 and the second 3.4, 6 miles North of Prague, Oklahoma, which is not too close to here.

EDIT: The distance to Prague is 68 miles South, so that would put the epicenter of the quake at about 62 miles South of here. At first, I thought that one of my neighbors must have blown something up in the complex.
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05 Nov 2011   #3
Airbot

Windows 7 Ultimate x64 SP1
 
 

I use USGS site for the live updates, as you mentioned.

Latest Earthquakes in the USA - Last 7 days

Maybe the big earthquakes that you would feel are rare there, but not sure how rare any earthquakes there are. That area around OK city usually has 3.0 and lower average earthquakes quite regularly that I've seen monitoring the site daily for over a year now. You're just not feeling them.

There's obviously some small isolated minor fault line/s there near OK city that isn't recognized/officially established yet.
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05 Nov 2011   #4
seekermeister

W7x64 Pro, SuSe 12.1/** W7 x64 Pro, XP MCE
 
 

I will admit that I have never paid too much attention to earthquakes living here, because I have never felt one before, nor have I ever heard of one mentioned on the news. Looking at one earthquake map, it seems that like you say, that there are probably some very minor tremors nearby, but so mild that nobody notices them.
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05 Nov 2011   #5
seekermeister

W7x64 Pro, SuSe 12.1/** W7 x64 Pro, XP MCE
 
 

That's ominous...about 5 minutes ago, there was another quake. I hope these are not leading up to a truly big one. I checked the USGS website, but they had not yet updated their info.
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05 Nov 2011   #6
Brink
Microsoft MVP

64-bit Windows 10 Pro
 
 

It must have been a decent one. I felt a slight trimble for a couple of seconds where I'm at in TX.
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05 Nov 2011   #7
Airbot

Windows 7 Ultimate x64 SP1
 
 

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05 Nov 2011   #8
Golden
Microsoft MVP

Windows 7 Ult. x64
 
 

Quote   Quote: Originally Posted by seekermeister View Post
That's ominous...about 5 minutes ago, there was another quake. I hope these are not leading up to a truly big one. I checked the USGS website, but they had not yet updated their info.
Its very common to experience what are termed after-shocks, post an earthquake proper. The crust is rigid, so the rocks destress in response to movement along fault planes - this is what you are experiencing.

In a major earthquake there are no small precursor quakes : energy builds up on major fault lines and then is suddenly released : this is the typical earthquake.
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05 Nov 2011   #9
seekermeister

W7x64 Pro, SuSe 12.1/** W7 x64 Pro, XP MCE
 
 

This one was ~ 75 miles Southwest of here, but still in the general area of the last shake. A little stronger at 5.2 and it lasted somewhat longer than before.
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05 Nov 2011   #10
seekermeister

W7x64 Pro, SuSe 12.1/** W7 x64 Pro, XP MCE
 
 

Quote   Quote: Originally Posted by Golden View Post
Quote   Quote: Originally Posted by seekermeister View Post
That's ominous...about 5 minutes ago, there was another quake. I hope these are not leading up to a truly big one. I checked the USGS website, but they had not yet updated their info.
Its very common to experience what are termed after-shocks, post an earthquake proper. The crust is rigid, so the rocks destress in response to movement along fault planes - this is what you are experiencing.
I would tend not to consider this an after shock, simply because the magnitude is increasing, rather than abating.

Quote:
In a major earthquake there are no small precursor quakes : energy builds up on major fault lines and then is suddenly released : this is the typical earthquake.
I'm certainly no seismologist, but it is my understanding the there are precursor shocks prior to the primary one at times.
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