Some moons in the solar system are heated by the gravitational push and pull exerted upon them by their planets. Our moon pulls on Earth enough to cause tides upon trillions of tons of water. After large solar flares eject billions of tons of charged particles near Earth, it is logical to assume that this gravitational influence would cause additional tectonic pressure.
The recent Honshu earthquake moved Japan east. This would seem to infer that on the opposite side of the associated tectonic plates there would be a pressure change. Either an increase or decrease in pressure could start a chain reaction of earthquakes as the pressure equalizes between connected tectonic plates. If we add a few billion tons of gravity to the cycle, should we see an increase in large quake frequency?
Here is a list of my USGS global earthquake ( >= 6.0 magnitude) email alerts since the last significant Honshu aftershock:
- 7.7 7/6/2011 KERMADEC ISLANDS REGION
- 7.4 6/23/2011 Aleutian Islands
- 6.1 6/20/2011 Santa Cruz
- 6.5 6/20/2011 AntofAgasta, Chile
- 6.6 15 Jun 2011 NEW BRITAIN REGION, P.N.G.
- 6.0 12 Jun 2011 SOUTH ISLAND OF NEW ZEALAND
- 6.0 7 Jun 2011 SOUTHERN PERU
- 6.1 21 May 2011 KERMADEC ISLANDS, NEW ZEALAND
- 6.5 15 May 2011 BOUGAINVILLE REGION, P.N.G
- 6.0 13 May 2011 COSTA RICA
- 7.1 10 May 2011 LOYALTY ISLANDS