地震波是通过地表传播的波体，通常是由地壳震动或爆炸引起的。
Seismic waves are waves that travel through the Earth, most often as the result of a tectonic earthquake, sometimes from an explosion.
地震通常由断层的突然滑动所致，除了地壳震动外，更因释放能量引发其他灾难，例如火灾、滑坡及海啸。
Earthquake is usually caused by a sudden slip on a fault, resulting in ground shaking and release of seismic energy. Fire, landslide and tsunami are common hazards following an earthquake.
地震是一种穿过地壳的震动。
An earthquake is a vibration that travels through the earth's crust.
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