Article

2017-11-27 Science

Discriminating between natural versus induced seismicity from long-term deformation history of intraplate faults

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Posted by Skidmark 2017-11-27 00:00|| || Front Page|| [9 views ] Top

#1 I assume small quakes. Nothing compared to what you would get from natural movement on the faults.

BTW, small manmade quakes have been occuring ever since underground coal mining started.

Posted by phil_b 2017-11-27 01:20|| 2017-11-27 01:20|| Front Page Top

#2 Any Man-made quake is a Blessing in defusing the power of a larger quake.

I say drill everywhere and often. Men do not make earthquakes. Teutonic plates do.

The more and smaller quakes the better.

Posted by newc 2017-11-27 02:32|| 2017-11-27 02:32|| Front Page Top

#3 A local swarm of pre and post tremblors still causes public and private infrastructure damage. Not so small.

Posted by Skidmark 2017-11-27 02:35|| 2017-11-27 02:35|| Front Page Top

#4 Any Man-made quake is a Blessing in defusing the power of a larger quake.

I expect that is generally true. An Analysis by size of quake would be interesting, but I doubt they have the data to say other than an increase in (small) quakes has occured. That they don't even mention size of quake (in the abstract) suggests agenda to me.

Posted by phil_b 2017-11-27 03:12|| 2017-11-27 03:12|| Front Page Top

#5 The real question is would smaller quakes that could be bigger or smaller violate liability?

I say no. You do determine the ground you settle, and seriously, if a plate shift happens and your layer already triggered, you were brought to a lesser amount of damage.

Seriously, they cannot predict a storm 3 hours from your house and they think they can process the crust of the earth?

Posted by newc 2017-11-27 03:22|| 2017-11-27 03:22|| Front Page Top

#6 I remember working on Duty Rosters paperwork in a old wooden Barrack in California ( never been in a quake before in my life) and suddenly the walls and the ceiling start creaking and dust drops out of the ceiling on my desk and I look out the window at the "Grinder" ( the Drill Field ) which is asphalt and its rippling like its the rubber sheet on a swimming Pool and the cracks in the asphalt are "breathing".
Then it stops and welcome to California. I go outside and the hills around the base have small dirt slides visible.
Yeah, welcome to California. Seen houes with porches on stilts collapse too. But then people will build anywhere in California, they live in California after all. Not too bright or they would have stayed in Kansas. Tornados in Kansas, of course. But , at least, its better than living in Newark or Baltimore.

Posted by Angeash Crise6937 2017-11-27 09:40|| 2017-11-27 09:40|| Front Page Top

#7 The largest temblor in the study was 4.0 in Johnson City in 2015 at 8km depth. Seems like a lot of lateral and vertical offset from the known injection sites, but then they admit it's at preliminary study.
As I recall, the AEC is supposed to have caused a quake swarm in Colorado in the '70's injecting liquid radioactive waste in the Rockies in northern CO.

Posted by ed in texas 2017-11-27 12:30|| 2017-11-27 12:30|| Front Page Top

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