Hi Bending Light!

Just read this on my news widget and thought you would like the link.

[link to stateimpact.npr.org]

Snip...Earthquakes are known more for their destructive force than for the noise they produce, but a phone call to William Ellsworth, a seismologist with the United States Geological Survey Earthquake Science Center in Menlo Park, California, confirmed that they can be heard as well........
“When a fault slips suddenly underground it radiates two different kinds of seismic waves,” Ellsworth tells StateImpact Texas. “One is called a P wave and this is an acoustic wave, the same kind of wave that we hear with our ears. The other wave is an S wave or shear wave, and it’s the wave that carries most of the energy that we typically feel.”

Ellsworth says that P wave travels faster than the S wave and when it reaches the earth’s surface it can create a loud noise under the right conditions.

“So it’s a little like thunder,” Ellsworth says. “You may see the flash in the distance, and then it takes a while for the air wave, in this case, to propagate, and make the boom that, in this case, you associate with lightening.”


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Pretty interesting. Have you overlaid your maps with injection well maps? There could be a correlation.




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