As a geologist with a focus on seismology, I can tell you that the most common type of earthquake is the
tectonic earthquake. These earthquakes are the result of stress build-up and subsequent release along faults within the Earth's crust. This stress is primarily caused by the movement of
tectonic plates, which are massive slabs of solid rock that make up the Earth's surface. When the plates move relative to each other, they can cause the rocks to break and shift, resulting in an earthquake.
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