伏地、躲避、抓紧
定义
地震摇晃期间国际推荐的保护行动。跪下，在坚固家具下躲避，并抓紧直到摇晃停止。
示例
大震撼演习（Great ShakeOut）每年与数百万参与者一起进行伏地、躲避、抓紧练习。
相关术语
相关指南
地震是什么?完整入门指南
Learn what causes earthquakes, how they occur along fault lines, and why some regions experience more seismic activity than others.
余震解释:为什么地震会成群出现?
Aftershocks can continue for months or years after a major earthquake. Learn what causes them, how they're predicted, and when they'll stop.
小地震能防止大地震吗?
Small earthquakes do not release enough energy to prevent large ones. Learn the math behind why this popular belief is wrong.
站在门口:为什么这个建议已过时
Standing in a doorway during an earthquake is outdated advice that can be dangerous. Learn why Drop, Cover, Hold On is safer.
加州的大地震:区分事实与虚构
California's Big One is real science, not science fiction. Learn what seismologists actually predict and how California is preparing.
月球位相和地震:有关联吗?
Tidal forces from the moon have a tiny effect on earthquake triggering. Learn what research shows about lunar influence on seismicity.
生命三角形vs蹲下、遮蔽、抓住
The Triangle of Life theory contradicts scientific consensus. Learn why Drop Cover Hold On remains the recommended earthquake safety action.
完整的地震防备检查清单
A comprehensive, step-by-step earthquake preparedness checklist covering supplies, home safety, communication plans, and financial protection.
蹲下、遮蔽、抓住:正确的反应方式
Drop, Cover, and Hold On is the proven earthquake safety action. Learn the correct technique and why alternatives like doorways are dangerous.
地震期间在室内做什么:室内安全
Know exactly what to do during earthquake shaking when you're indoors. Covers homes, offices, stores, elevators, and other indoor scenarios.
常见问题解答
震中是地表上位于震源（地震破裂开始处）正上方的点。通常以经纬度坐标报告。最强的震动通常发生在震中附近，但当地土壤条件和断层几何形态可能使最大损害区域发生偏移。
地震仪（地震计）是检测和记录地震波引起的地面运动的仪器。现代宽频带地震仪可以检测到比原子宽度还小的运动。全球地震仪网络使科学家能够在几分钟内确定地震的位置和震级。
P波（纵波）是通过岩石传播最快的压缩波，最先到达地震台站。S波（横波）到达较晚但引起更大的地面震动。P波可以通过固体、液体和气体传播；S波只能通过固体传播。两者之间的时间差有助于确定地震的距离。
震源是地球内部地震破裂开始的点。它由经度、纬度和深度来描述。震源与其正上方地表之间的垂直距离即为地震深度，这对地表感受到的震动强度有很大影响。
地震学是研究地震和地震波在地球内部传播的科学学科。它包括地震检测、定位和特征描述、地球内部结构、地震危险性评估和地震工程。地震学家利用全球地震仪网络的数据来研究这些现象。