How Do Earthquakes Start?

Earthquake is the result of seismic waves, which are caused by at once release of energy from Earth's crust. Theory of plate tectonics explain earthquakes more. According to this theory, Earth's plates are raft above a molten layer which is about 60 miles deep, where edges of these plates meet, stress build up and earthquake starts shaking earth's surface.
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Blurtit reference-How earthquake happens!

Earthquake is the result of seismic waves, which are caused by at once release of energy from Earth's crust. Theory of plate tectonics explain earthquakes more. According to this theory, Earth's plates are raft above a molten layer which is about 60 miles deep, where edges of these plates meet, stress build up and earthquake starts shaking earth's surface.

Earthquakes start movement of rock in the earth crust