地震是地球板块运动引起的自然现象。
An earthquake is a natural phenomenon caused by tectonic plate movement.
1-3级：轻微，一般无感或微弱感。
Magnitude 1-3: Minor, generally imperceptible or weak feeling.
遇到地震要保持冷静，迅速躲在坚固物体旁或紧急避难所。
Stay calm during an earthquake and quickly hide near sturdy objects or a designated shelter.