地震聚集
定义
地震倾向于以群的形式出现（主余震序列或群活动）而不是在时间上随机出现。违反了独立、随机出现的常见假设。
示例
ETAS模型通过将每次地震视为更多地震的潜在触发器来解释聚集。
相关术语
相关指南
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.
前震:能预测主震吗?
Foreshocks occur before some major earthquakes, but can they be used for prediction? Learn the science behind foreshocks and their limitations.
地震频率:多久发生一次?
About 500,000 earthquakes occur yearly, but only 100 cause damage. Learn the frequency-magnitude relationship and why big quakes are rare.
2011年东北地震和海啸:完整分析
The 2011 M9.1 Tohoku earthquake triggered a devastating tsunami and nuclear disaster. A comprehensive analysis of one of history's worst earthquakes.
2023年土耳其-叙利亚地震:双重灾难
Two devastating earthquakes within hours killed over 50,000 in Turkey and Syria. The most destructive earthquake disaster of the 2020s.
地震天气:为什么是迷思
There is no such thing as earthquake weather. Learn why this persistent myth has no scientific basis and what actually triggers earthquakes.
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.
俯冲带:地球最强大的地震工厂
Subduction zones produce the world's largest earthquakes including the M9.5 Chile 1960 event. Learn how they work and where they exist.
我们能预测地震吗?科学vs迷信
Despite decades of research, reliable earthquake prediction remains impossible. Learn why forecasting probabilities is the best we can do.
如何使用美国地质勘探局地震地图
The USGS earthquake map shows every detected earthquake in near-real time. Learn how to read it, filter data, and understand earthquake feeds.
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。