Question

Why do earthquakes usually occur at plate boundaries?

Answer 1

Answer:

The rock is generally moving along massive cracks in the Earth's crust. These are called faults. Most earthquakes that we know of usually happen at/near the boundaries in between the Earth's tectonic plates. This is because that is where there is mostly a massive concentration of faults. Movement along these faults can also cause earthquakes as well.

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Answer 2

Answer:

Earthquakes happen when rock below the Earth's surface moves abruptly. Usually, the rock is moving along large cracks in Earth's crust called faults. Most earthquakes happen at or near the boundaries between Earth's tectonic plates because that's where there is usually a large concentration of faults.

Explanation: