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If an earthquake occurs in a region, why the tremors is felt in a little far away regions while there are no tremors felt in between the two regions. One would expect that  the ripples created by the earthquake should travel in all directions but this apparently does not seem to happen. What is the scientific explanation for this?

I'm not a seismologist, but I do understand that earthquakes have some direction dependence to the energy of their waves. This depends on how the meeting tectonic plates shift and the intervening rock between the epicenter of the quake and the place observed at the surface. Interaction between the sea bed and the ocean (how much displacement, and it's direction) determine tsunami formation, too.


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Dr. Stephen O. Nelson


I can answer most basic physics questions, physics questions about science fiction and everyday observations of physics, etc. I'm also usually good for science fair advice (I'm the regional science fair director). I do not answer homework problems. I will occasionally point out where a homework solution went wrong, though. I'm usually good at explaining odd observations that seem counterintuitive, energy science, nuclear physics, nuclear astrophysics, and alternative theories of physics are my specialties.


I was a physics professor at the University of Texas of the Permian Basin, research in nuclear technology and nuclear astrophysics. My travelling science show saw over 20,000 students of all ages. I taught physics, nuclear chemistry, radiation safety, vacuum technology, and answer tons of questions as I tour schools encouraging students to consider careers in science. I moved on to a non-academic job with more research just recently.

Ph. D. from Duke University in physics, research in nuclear astrophysics reactions, gamma-ray astronomy technology, and advanced nuclear reactors.

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