大森法则
定义
一条经验规律，描述余震频率随时间的衰减率：余震率大约按主震后时间的倒数衰减。
示例
根据大森法则，如果第一天有100次余震，第十天预期约10次。
相关术语
相关指南
余震解释:为什么地震会成群出现?
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2011年东北地震和海啸:完整分析
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走滑断层:板块横向滑动时
Transform faults like the San Andreas produce major earthquakes. Learn how horizontal plate motion creates destructive seismicity.
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.
解读地震数据:初学者指南
Learn to interpret earthquake data including magnitude, depth, intensity, and location. A practical guide to reading earthquake reports.
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。