Originally Posted by MarkV
No it only creates a localised set of tremors. It does create seismic shock waves that specialised equipment can can detect halfway round the world but those are not earthquakes any more than the ones that oil exploration companies create almost daily using conventional explosive are. And it would only start a San Andreas Fault quake if a] it was deep enough and b] pressure had already built up inside the fault over time (you don't get major earthquakes every day) compared to the energy released by a big quake even an H bomb is puny. It might be able to trigger one if one was due. It is fortunate for us humans that big quakes usually have their epicentres really deep down.
If the seismic waves (induced seismicity, man-made earthquakes) were only a "localized set of tremors," they wouldn't be detecable by seismometers (specialist equipment) on the other side of the world.
The Human Chia Pet's most recent nuclear test registered as a magnitude 6.3 earthquake on USGS "specialist equipment" on the other side of the world. The quake was felt over a wide area...
North Korea shaken by strong tremors in likely nuclear test
- North Korea was shaken by as many as two strong tremors on Sunday, with the South's officials saying it was presumed to be a sixth nuclear test
- North Korean television later reportedly said it was a successful test of a hydrogen bomb
Leslie Shaffer | @LeslieShaffer1
Published 11:43 PM ET Sat, 2 Sept 2017 | Updated 11:34 AM ET Sun, 3 Sept 2017
North Korea was struck by as many as two strong tremors on Sunday, with the South's Joint Chiefs of Staff saying it was presumed to be a sixth nuclear test.
The USGS initially reported a first tremor as a 5.6 magnitude, but later raised it to 6.3, while China's earthquake administration said it detected a 6.3 magnitude earthquake in Northeastern North Korea, calling it a "suspected explosion," Reuters reported.
The depth of that quake was recorded as zero kilometers, the China earthquake administration said, according to Reuters.
The Human Chia Pet's apparent H-bomb test yielded 2 "earthquakes"
And then the collapse of the test chamber...
The charges used for seismic surveys are very localized and undetectable by seismometers more than a few km from the shot.