Hi All. Here is an interesting article from Dr. John Derr. Take Care…Don in creepy town

John Derr, Ph.D., Geophysicist, Albuquerque Seismological Laboratory and Global Seismological Observatories, U. S. Geological Survey, Albuquerque, New Mexico: "It's very clear that this swarm has been triggered by the main earthquake and it looks to me as if we have a major stress-relieving process going on on this strike slip fault.

Half a world away in Ecuador, we have something that I'm speculating is going to be very interesting and something that should be looked at very closely. Because Ecuador is precisely at the antipode for these earthquakes ­ that is precisely half way around the world. The body waves that go deep into the Earth are going to go straight through the middle of the center of the core on their way to the antipode. But the surface waves radiate out from the epicenter and converge at the antipode. And it's entirely conceivable that that might trigger some sort of motion on the faults under Ecuador.

Now, the earthquake activity that's happening in Ecuador is off the coast, but the subduction zone dips steeply under Ecuador and actually as far east as western Brazil. So, there are places on that fault zone that are at the antipode from these earthquakes happening in Indonesia (Andaman and Nicobar Islands, India) ­ precisely at the antipode.

• Antipode