All the world is 'floating' as it were on a number of so-called tectonic plates that very slowly move and regularly collide. The lines where they border each other we call 'faults'. When they do collide, one plate slides underneath or alongside the other. That is not a gradual process: the other plate does not yield easily so enormous pressure first builds up, and then - when the pressure has become irresistible - the plate moves forward with a shock. That's in simple terms when you get an earthquake.
Faults are fractures in the Earth's crust where rocks have moved past each other. When the rocks along a fault suddenly shift, it can cause an earthquake. The movement along faults is what generates the energy that produces earthquakes.
Faults DO NOT produce earthquakes, faults are produced by earthquakes. This means that earthquake loci are centered on and along faults. The energy released by an earthquake is the stress energy built up as a result of plate tectonic forces.
Normal faults are when you have hanging walls that slide down relative to and below the footwall. Dip-slip faults are normal faults.
By locating where faults are active and where past earthquake have occurred.
Faults
Geologists collect data on friction along the side of faults so that they can predict how much pressure is applied on the faults so they can predict how strong the earthquake is.
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Earthquake
plates of the earth crash into each other along faults causing an earthquake
An earthquake's magnitude is a measure of its strength.
Faults DO NOT produce earthquakes, faults are produced by earthquakes. This means that earthquake loci are centered on and along faults. The energy released by an earthquake is the strain energy built up as a result of plate tectonic forces. Some faults move easily and thus no strain energy builds up.
Because the earth's plates shift