Whats causes Earthquakes?

Question

Since today the earthquake happened, I wanted to know how earthquakes are formed and how they make the earth move. I forgot because I haven't really thought about it yet.

Thanks for answering. Good detailed answers please!

Answer 1

Please visit my fallowing site or just type A.Ganapathy India in google and read many of my answers given to several persons about their doubt in seismology.

http://www.mediafire.com/?1bbdzzdml1e

The main cause is the sudden release of energy from the tectonic plate boundary.

Answer 2

well you could go on and on describing the causes earthquakes but in its most basic form earth quakes are caused by tectonic plates they sit on the mantle(the second layer of the earth). theese plates are always moving and where they collide together or or pull apart are called faults. when the plates pull or push at theese faults waves are created that basically cause energy that travels through the ground

hope this helps

Answer 3

Try doing a simple search on 'earhtquakes'. Two refs below are a good start.

Answer 4

Shifting of the Tectonic plates  at a fault line